GRADING REPORT CHS424
- Identification: Natural Unheated & Untreated Multicolor Sapphire
- Carat: 4.24
- Shape: Oval
- Measures: 5.02x7.74x3.24 (millimeter)
- Color Grade: n.a.
- Tone: M50-50
- Color Zoning: None
- Clarity: Moderately Included
- Cutting Grade: Good
o Brilliancy: 50%
o Depth: 63%
- Origin: Tanzania
- Treatment: None
Certificate No: 38424 (see more images)
Overall Grade: Good
Comment: Surprise sapphire from Tanzania. In mixed light golden orange and green, then more rose in tungsten and green yellow with a purplish red at day. Very uncommon. Especially the red/green combination is remarkable (and priced in alexandrite and garnet). Strictly spoken this is not a color changer but a multicolor sapphire because the different colors appear to be present all at once in every light. However the color shifts strongly in different settings, but (as the additional images show) there is this unexpected strength of orange and red in sunlight (as shown in main photo). Usually in a color changer one would expect the red/orange to disappear at day but it doesn't. The camera exaggerates the red but even in the darkest light setting one catches that rose undertone. All very mild colors, reminding of a late autumn forest in the northern hemisphere: green, yellow, red and brown. Forced to name a main color I shall opt for hay yellow, puh, the length of this comment speaks for the out-of-the-ordinary character. Bargain (under $500/ct!) for a big untreated sapphire in calm colors; and an adventure for the gemologist. A set of parallel needles are just visible to the unaided eye.
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