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Ed Bristol
  


​Untreated Precision Cut Gemstones

Razor-Sharp Master-Cuts! From the best cutters of Europe, Asia and the USA. Nothing less but perfect! 

What is a precision cut and why are they more expensive?

tourmaline free of treatments, concave precision cut, eye-clean over 15 carat
Price:
$14,900.00
product
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15.49 Carat
Neon Blue-Green
Medium Dark 60
Lightly Included

fancey yellow diamond in square cushion from Africa
Price:
$1,290.00
product
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0.24 Carat
Bright Vivid Yellow
Light 33 
Free of Inclusions

square cushion diamonds without artificially coloring
Price:
$1,690.00
product
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0.23 Carat
Fancy Green-Yellow
Medium Dark 60
Lightly Included

blue round brilliant from Ceylon, unheated and natural, free of inclusions, IGI report included
Price:
$750.00
product
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0.15 Carat
Lively Sky Blue
Medium 50
Free of Inclusions

pink princes precision cut africa sapphire unheated and natural
Price:
$2,600.00
product
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1.40 Carat
Pastel Purplish Pink
Medium Dark 65
Lightly Included

padparadscha spinel in square cushion from Sri Lanka
Price:
$1,890.00
product
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0.32 Carat
Pumpkin Orange
Medium Dark 60
Free of Inclusions

matching pair of certified unheated trillion beryls in canary yelloe
Price:
$1,400.00
product
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1.83 Carat (total) (hold)
Canaray Yellow
Medium 50
Free of Inclusions

blue-purple round brilliant from Ceylon, unheated and natural
Price:
$750.00
product
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0.27 Carat
Blue/Purple
Medium 50
Lightly Included

paraiba type tourmaline free of treatments, precision cut and free of inclusions
Price:
$1,500.00
product
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0.66 Carat (hold)
Neon Blue-Green
Medium 55
Free of Inclusions

blue round brilliant from Ceylon, unheated and natural, free of inclusions,
Price:
$825.00
product
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0.23 Carat
Lavender Blue
Medium 50
Free of Inclusions

deep red-orange rubelite free of treatments, round and over 6 carat
Price:
$920.00
product
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0.51 Carat
Deep Purplish-Orange Pink
Medium Dark 75
Free of Inclusions

pink round brilliant from Ceylon, unheated and natural in near 7mm
Price:
$2,900.00
product
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1.55 Carat
Lavender Pink
Medium 50
Lightly Included & Silk

Rich orange pink Mehenge spinel
Price:
$8,400.00
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2.82 Carat (pair)
Rich Orange Pink
Medium Dark 65
Lightly Included

 

Untreated Green blue purple Tanzanite

2.24 Carat (sold)
Violet-Blue-Purple-Green 
Medium 50 to MD75
Free of Inclusions

Kashmir blue Ceylon sapphire without inclusions or treatments
Price:
$7,500.00
product
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1.38 Carat
Deep Kashmir Blue
Medium Dark 80
Free of Inclusions

Iolite, free of treatments, deep violet in pleochroic gem
Price:
$490.00
product
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1.04 Carat
Blue-Purple-Violet
Medium Dark 60
Free of Inclusions

matching pair of certified alexandrites with fine color change
Price:
$780.00
product
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1.19 Carat (pair)
Midnight Violet
Medium Dark 75
Free of Inclusions

three carat amethyst unheated from Brazil
Price:
$990.00
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3.56 Carat
Mild Reddish Purple
Medium 55
Free of Inclusions

Iolite, free of treatments, deep violet in pleochroic gem
Reg. Price:
$490.00
Sale Price:
$290.00
Save:
$200.00
product
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0.59 Carat
Deepest Violet
Medium Dark 75
Lightly Included

certified unheated IGI sapphire in 3mm round brilliant precision cut
Price:
$550.00
product
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0.14 Carat
Sky Blue
Medium 50
Free of Inclusions

matching pair of certified unheated 3mm round sapphire
Price:
$999.00
product
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0.30 Carat (total)
Sky Blue & Lavender Pink
Light Medium 40/50
Free of Inclusions

IGI certified pink unheated sapphire in diamond stile and cut and size
Price:
$550.00
product
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0.16 Carat
Lavender Pink
Light 40
Free of Inclusions

untreated faceted fire opal in trillion precision cut
Price:
$750.00
product
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1.06 Carat
Silky Neon-Orange
Medium 50
Free of Inclusions

paraiba-type tourmaline in emerald cut

1.47 Carat (sold)
Neon Blue-Green
Medium 55
Free of Inclusions

Unheated yellow sapphire from Sri Lanka in princess cut
Price:
$1,750.00
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1.18 Carat (hold)
Bright Pure Yellow
Medium 50
Lightly Included

paraiba type tourmaline free of treatments, precision cut and free of inclusions
Price:
$1,190.00
product
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0.89 Carat
Pool Blue-Green
Light 40 to MD60
Free of Inclusions

Tri-colored unheated sapphire from Tanzania
Price:
$975.00
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0.74 Carat
Bi-Colored
Light 40 & Medium Dark 70
Free of Inclusions

drop lime green green pakistani peridot free of treatments
Price:
$1,990.00
product
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2.33 Carat
Neon Lime Green 
Medium Dark 60
Free of Inclusions

seafoam tourmaline free of treatments, precision cut
Price:
$990.00
product
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0.76 Carat
Shiny Teal-Blue-Green
Medium 50
Free of Inclusions

Purple red true Kashmir ruby unheated and full sized
Price:
$12,500.00
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1.93 Carat
Deep Purple-Red 
Medium Dark 75
Lightly Included

neon green pakistani peridot free of treatments, round and over 6 carat and 11mm
Price:
$3,600.00
product
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4.02 Carat
Shiny Neon Green 
Medium 55
Free of Inclusions

White Ceylon sapphire
Price:
$1,290.00
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0.79 Carat
White White
Very Lightly Included

 

mint green in natural untreated tourmaline oval from Kenya
Price:
$950.00
product
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2.89 Carat
Deepest Mint Green
Medium Dark 80
Free of Inclusions

giant orange hessonite in emerald cut
Price:
$3,500.00
product
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7.00 Carat 
Red-Orange
Medium Dark 75
Lightly Included

US cut sapphire no heat green blue violet tint
Price:
$650.00
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0.32 Carat
Tinted White
Light 10
Free of Inclusions

 

certified tsavorite in neon green
Price:
$1,100.00
product
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0.53 Carat
Intense Neon Green
Medium Dark 60
Lightly Included

seafoam tourmaline free of treatments, precision cut
Reg. Price:
$760.00
Sale Price:
$490.00
Save:
$270.00
product
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0.87 Carat
Bright Seafoam
Light Medium 33
Free of Inclusions

Metallic blue Montana sapphire
Price:
$82,000.00
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6.19 Carat
Metallic Blue
Medium Dark 60
Lightly Included

 

Price:
$975.00
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1.79 Carat
Golden Yellow
Medium Dark 75
Free of Inclusions

 

Colorado Topaz

6.04 Carat (sold)
Fancy Blue
Light 20
Free of Inclusions

Lavender pink purple Montana sapphire
Price:
$1,560.00
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0.57 Carat
Lavender Pink Purple
Medium 50
Free of Inclusions

Deep poppy red Oregon sunstone
Price:
$4,200.00
product
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3.00 Carat
Deep Poppy Red
Medium Dark 70
Free of Inclusions

Tinted white Colorado topaz
Price:
$1,490.00
product
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2.60 Carat
Tinted White
Very Lightly Included

Mild sunset orange Oregon sunstone
Price:
$7,500.00
product
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6.20 Carat
Mild Sunset Orange
Medium 55
Free of Inclusions

dark blue green Mozambique tourmaline concave cut
Price:
$1,600.00
product
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1.87 Carat
Dark Blue-Green
Medium Dark 70-90
Free of Inclusions

precision cut chrysoberyl in fine yellow
Price:
$2,550.00
product
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2.94 Carat
Lively Yellow Green
Medium Dark 70
Lightly Included

hessonite without treatments DSEF report and best cutting in deep red
Price:
$3,200.00
product
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6.56 Carat
Deep Bordeaux Red
Medium Dark 75
Very Lightly Included

Red green orange yellow Pakistani titanite
Price:
$1,950.00
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2.71 Carat
Red/Green/Orange/Yellow
Medium Dark 70
Free of Inclusions 

white gold and diamonds with ten carats zultanite as center
Price:
$96,000.00
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From the David Jerome Collection:
Untreated 10.65ct Zultanite 
in 18k White Gold
with 0.77ct Diamonds
Color Change

cushion clean hessonite for astrology and beauty
Price:
$2,700.00
product
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3.19 Carat 
Deep Fiery Orange
Medium Dark 75
Very Lightly Included

lime green garnet in natural untreated oval from west africa
Price:
$930.00
product
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1.24 Carat
Intense Lime Yellow-Green
Medium 55
Free of Inclusions

white gold and diamonds surrounding one carat clean  unheated Ceylon sapphire
Price:
$12,500.00
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From the David Jerome Collection:
Unheated 1.00 Ceylon Sapphire
in 18k White Gold
with 0.45ct Diamonds
Hot Neon Pink

finest orange-red-yellow spanish sphalerite in world-class unbeatable quality
Price:
$18,600.00
product
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25.24 Carat*
Fire of Orange, Red & Yellow
Medium Dark 60-80
Free of Inclusions
* Price includes setting

Mild pink purple Badakshan spinel
Price:
$3,600.00
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2.55 Carat
Shiny Pink-Purple
Medium Dark 60
Free of Inclusions

 

spess garnet in natural untreated round
Price:
$1,500.00
product
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0.43 Carat
Neon Yellow-Orange
Medium Dark 60
Free of Inclusions

matching pair of certified untreated green garnets in highest quality
Price:
$2,240.00
product
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2.25 Carat
Intense Lime Yellow Green
Medium 50
Free of Inclusions

1+ carat mandarine garnet loliondo quality clean
Price:
$2,700.00
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1.63 Carat
Intense Deep Orange
Medium Dark 70
Lightly Included

Baby violet blue Ceylon spinel
Price:
$3,900.00
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2.72 Carat
Periwinkle Violet
Medium 50
Lightly Included

full size black spinel without treatments
Price:
$999.00
product
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6.28 Carat
Raven Black
D 100
Free of Inclusions

white gold and diamonds around a two carat unheated burma sapphire in royal blue
Price:
$36,000.00
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From the David Jerome Collection:
Unheated 2.16 ct Burma Sapphire
in 18k White Gold
with 0.88ct Diamonds
Fine Royal Blue

No heat natural pink yellow sapphire 5mm round

0.47 Carat (sold)
Rainbow in Lime Green
Medium 50
Lightly Included

 

mint green in natural untreated tourmaline oval from Kenya
Price:
$525.00
product
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1.17 Carat
Mint Green
Medium Dark 75
Free of Inclusions

intense pool blue-green aquamarine of seven carats, untreated and lens clean
Price:
$62,000.00
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From the David Jerome Collection:
Unheated 7.18ct Brazilian Aquamarine 
in 950 Platinum
with 0.36ct Diamonds
Intense Pool Greenish Blue

fine orange-red hessonite over 5 carats untreated from Sri Lanka
Price:
$2,490.00
product
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5.10 Carat
Cinnamon Orange
Medium Dark 75
Lightly Included

white gold and diamonds around three carats rubellite earrings
Price:
$14,200.00
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From the David Jerome Collection:
Untreated 3.44 ct Brazilian Rubellite
in 18k White Gold
with 0.69ct Diamonds
Deep Lush Red

mint green in natural untreated tourmaline oval from Kenya
Price:
$750.00
product
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1.23 Carat
Deep Mint Green
Medium Dark 70
Free of Inclusions

Unheated deepest blue sapphire in finest cutting
Price:
$1,950.00
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1.73 Carat
Midnight Blue
Dark 90
Free of Inclusions

 

bright green yellow chrysoberyl
Reg. Price:
$650.00
Sale Price:
$450.00
Save:
$200.00
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0.91 Carat
Yellow Green
Light Medium 40
Free of Inclusions

fine orange-red hessonite for pendant in untreated state from Sri Lanka
Price:
$2,240.00
product
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3.45 Carat
Bright Red Orange
Medium Dark 65
Lightly Included

Mild bubble gum pink Tanzania spinel
Price:
$9,300.00
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3.05 Carat
Bubble Gum Pink
Medium 50
Lightly Included

 

intense pool blue aquamarine of near thirty carats, untreated and lens clean in platinum
Price:
$92,000.00
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From the David Jerome Collection:
Unheated 28.31ct Brazilian Aquamarine 
in 950 Platinum
with 0.36ct Diamonds
Intense Pool Blue

emerald shaped no heat ruby from east africa GIA and IGI report
Price:
$9,500.00
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1.06 Carat
Lively Rose Red
Medium Dark 70
Lightly Included

untreated russian sphene titanite
Price:
$1,450.00
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2.33 Carat
Golden Greenish Yellow
Medium 55
Lightly Included

 

Unheated purple sapphire in finest cutting

1.44 Carat (sold)
Neon Purple
Medium Dark 60
Very Lightly Included

 

white gold and diamonds surrounding one carat clean  unheated Ceylon sapphire
Price:
$9,900.00
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From the David Jerome Collection:
Unheated 1.70 Tanzanian Spinel
in 18k White Gold
with 0.50ct Diamonds
Rich Rose Red

No heat pink-purple color changer sapphire
Price:
$750.00
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0.53 Carat
Peach Color-Shifter
Light Medium 40
Very Lightly Included

 

golden yellow apatite in museums size
Price:
$3,050.00
product
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12.03 Carat
Earthy Golden Honey Yellow
Medium Dark 60
Free of Inclusions

giant violet blue sapphire with 1.44 carat diamonds
Price:
$188,000.00
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From the David Jerome Collection:
Unheated 8.77ct Ceylon Sapphire
in 18k White Gold
with 1.44ct Brilliant Rounds
Flowery Violet Blue

Mild violet purple Ceylon spinel
Price:
$3,200.00
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2.75 Carat
Periwinkle Violet-Purple
Medium Dark 60
Free of Inclusions

 

A giant shield of white gold and diamonds around a smaller oval no-heat rich royal blue sapphire in
Price:
$12,900.00
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From the David Jerome Collection:
Unheated 0.92 ct Ceylon Sapphire
in 18k White Gold
with 0.49ct Diamonds
Fine Royal Blue

Pair of fine blue to purple color change fluorite

4.47 Carat (sold)
Color-Changer
Medium 50
Lightly Included (silk)

hessonite without treatments and IGI report 3 carats precision cutting
Price:
$4,500.00
product
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3.89 Carat (hold)
Resinous Orange
Medium Dark 60
Free of Inclusions

white gold and diamonds with two carat unoiled carats emerald
Price:
$49,000.00
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From the David Jerome Collection:
Untreated 1.98ct Emerald 
in 18k White Gold
with 0.29ct Diamonds
Deep Vivid Neon Green

unheated bi-color sapphire blue and yellow
Price:
$1,250.00
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0.81 Carat (hold)
Bi-Color Blue-Yellow
Light 25-33
Free of Inclusions

 

deepest green in natural tourmaline
Reg. Price:
$1,600.00
Sale Price:
$999.00
Save:
$601.00
product
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2.00 Carat
Blue in Dark Green
Medium Dark 80
Free of Inclusions

Ceylon Sillimanite in lime yellow and deep precision cut
Price:
$790.00
product
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1.38 Carat
Neon Lime Yellow
Medium 50
Free of Inclusions

flamingo pink morganite in whiote gold with diamonds
Price:
$156,000.00
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From the David Jerome Collection:
Untreated 19.76ct Brazilian Morganite 
in 18k White Gold
with 3.89ct Diamonds
Deep Peach/Salmon

Color changing Tanzanian sapphire from green to orange
Price:
$6,400.00
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3.21 Carat
Color-Changer
Medium Dark 65
Lightly Included

Grass green Afghani tourmaline
Price:
$1,900.00
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1.60 Carat
Bright Neon Green
Medium 50
Free of Inclusions

 

unheated white sapphire adamantine luster
Price:
$990.00
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0.64 Carat
White-White
Free of Inclusions

 

neon red-pink sapphire from Burma in platinum
Price:
$17,500.00
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From the David Jerome Collection:
Unheated 1.80 ct Burma Sapphire
in 950 Platinum
with 0.58 ct Brilliant Rounds
Neon Red-Pink

Neon purplish pink Burma sapphire
Price:
$14,900.00
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1.37 Carat
Neon Purplish Red-Pink
Medium Dark 70
Lightly Included

No heat orange sapphire
Price:
$1,550.00
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0.87 Carat
Peachy Orange
Light 33
Free of Inclusions

 

Price:
$900.00
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0.70 Carat
Color Changer
Medium Dark 80
Free of Inclusions

deepest blue in natural tourmaline aka indicolite
Reg. Price:
$2,500.00
Sale Price:
$1,600.00
Save:
$900.00
product
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2.52 Carat
Deep Metallic Blue
Medium Dark 75
Free of Inclusions

unheated yellow sapphire in precision cut
Price:
$3,900.00
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1.62 Carat
Fancy Diamond Yellow
Light 33
Lightly Included

 

white precision cut beryl round without treatments
Price:
$760.00
product
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2.04 Carat (hold)
Tinted White
Lightly Included

untreated two plus carat tsavorite in 10mm long pear with bubbles
Price:
$1,600.00
product
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0.68 Carat
Neon Green
Medium Dark 65
Very Lightly Included


What are precision cuts?

All gems in this section have been facetted according the highest standards of modern gemstone cutting.

What does this mean? Ever since the first human picked up a colored crystal to adorn his hairy self or his equally hairy companion, gemstones have been shaped to look prettier, incur magic or simply fit on a string.

Perhaps beginning in Idar-Oberstein, some 500 years ago, this shaping of natural gems became an official craft. Formal rules and standards were developed, and exported worldwide.

The industrial revolution produced the tools used in today’s lapidaries from Sri Lanka to Brazil. 

Formally incorrect, this old-world craft is often called ‘hand-cutting’ but we should better refer to ‘traditional cutting’ since precision cuts are also done by hand. The quality of traditional cutting depends on the individual performance of a craftsman/women. It can be anywhere from terribly shoddy to literally brilliant.

Over the last decade, a new dimension of perfection has been reached. The computer and its software, connected to precision cutting tools, have ‘liberated’ cutters from second guessing, gut-feeling and gut-decisions.

The results are spectacular. Facets end where they are supposed to end (that is exactly where the next facet begins), culets are pinpoint centered, girdles and tables are symmetric, height of crowns and pavilions, and their relation to each other, are a result of meticulous planning, nothing is left to chance.

Each new cut is based on the always unique rough and the specific demands that each gem variety presents to the cutter with individual reflective indexes, color distributions, and all the optical miracles that nature has blessed us with.

This is not to say that precision cuts are lifeless machine-based products. Designing a cut is still a creative act of art. Precision cutters have their own styles and characters, even if they use CAD and 3D software. Some are better than others. Each is unique.

Precision cuts need 25-50% more rough, and, as you can imagine from the qualified process, demand higher prices even than the finest traditional cutting.

Another term is ‘machine cut’, meaning that a gem is facetted in an automated process without any human input other than to program the machine doing the job. Obviously, the end-result of such a process could be very precise and flawless but will depend on the programming and quality of the machine doing the job. To my knowledge, machine-cuts are limited to cheaper rough, mostly synthetic or abundant small material.

Finally, I must explain the word ‘calibrated’. This term describes gems that are cut into given standard sizes so as to fit into mass-produced settings or so called ‘findings’. One would assume that ‘machine cut’ and ‘calibrated’ are the same, but this must not be, since a human cutter may well produce calibrated gems, though it sounds like little fun.

No doubt, the higher the value of the rough the less likely will we find calibrated and/or machine cut gems in the market.

Given the multidimensional, and often opposing, set of factors that every serious gem-design process entails, it is apparent that only human creativity and intuition can guarantee each unique and ultra-valuable ruby crystal a chance to become the most attractive gemstone possible. I hope we never get to the point of leaving this process to a machine, or do we? I don’t know.

Read about how to judge a precision cut on photo.


P.S. Excursion on fine traditional hand cutting: One needs a lens to distinguish a fine handcut from a perfect precision cut. The latter comes with exactly meeting edges, tightly ordered facets, 100% accurate angles, etc etc. all with zero human error, less with any ugly gem faux-pas. A perfect traditional handcut, like this one here, does also NOT commit any visible ugly offenses, no crude asymmetries, no fish-eye windows, no off-center culets or bad polishing etc. but under the lens you catch these little human defects that reveal the cutter's lack of design software and precision hard-ware. An experienced cutter with traditional quality tools and (most importantly) fine rough material can give a gem almost as much beauty as a precision cutter but the final detail is beyond his reach.

Does it matter, you may ask? Yes, if you love perfection and want only the best regardless of the cost. No, if you don't want to pay the precision-cut-premium, won't use the lens anyways, and 'only' want the prettiest gem for your money.

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Genuine testimonials since 2003
 

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