GRADING REPORT RCT1889
- Identification: Natural Unheated & Untreated Chrome Tourmaline
- Carat: 18.89
- Shape: Oval Cabochon
- Measures: 19.93x14.75x7.81 (millimeter)
- Color Grade: n.a.
- Tone: MD70
- Color Zoning: n.a.
- Clarity: Translucent
- Cutting Grade: Good
o Brilliancy: n.a.
o Depth: 53%
- Origin: Mozambique
- Treatment: None
Certificate No: 17208245 (see more images)
Overall Grade: n.a.
Comment: Here is a rarity: Iridescence in a chrome tourmaline (GIA certified), sparkling with the color of the rainbow like opal. (probably a result of silica or liquid captured in the gem). Red, blue, green, yellow and gold come and go as the gem is turned. Mineral collector item and a beauty for a most unique pendant. We have never seen this in chrome tourmaline before. It is sometimes found (and extra highly priced) in copper tourmaline.
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