7.67ct Natural Alexandrite and 0.78ctw Diamond 18K White Gold Ring (GIA Certifie
One electronically tested 18KT white gold ladies cast alexandrite and diamond ring with a bright polish finish. The featured alexandrite is set within an inner white gold basket with yellow gold prongs and an outer diamond bezel supported by diamond set split shoulders, completed by a three and one-half millimeter wide band. Trademark is HANA. Identified with markings of "18K". Condition is new, good workmanship. Containing:
One prong set round modified mixed cut natural alexandrite, measuring 10.13 - 10.67 x 8.26 mm, exact weight 7.67ct., type II, clarity is eye clean, medium dark, very slightly grayish, greenish brown color, (GIA gBr 6/3) to medium dark, very slightly grayish, yellowish brown (GIA yBr 6/3), cut is good. Transmitting light with no distortion, transparent. GIA Gemological Report attached. Graded loose prior to setting in the GIA Laboratory, Report #6192637138.
The greenish brown color was photographed under 6000K daylight the yellowish brown color was photographed under 2000K incandescent light, see the photographs to the right.
Alexandrite was discovered in the 1830's near the Tokovaya River in the Ural Mountains of Siberian Russia. It later became the national gemstone of Russia. The name "alexandrite" became official in 1842.
Alexandrite is a variety of chrysoberyl. It contains both beryllium and chromium. It is the chromium that accounts for the spectacular color change. The color change is the primary qualification for a chrysoberyl to be considered alexandrite. Alexandrite is strongly trichroic. Its color change results in a near-equal transmission of the blue-green and red portions of the spectrum, coupled with strong absorption in the yellow. Today Alexandrite is found in Brazil, India, Madagascar, Myanmar, Russia, Sri Lanka, Tanzania and Zimbabwe.
Fifty-Two prong set round brilliant cut diamonds approximate total weight of 52 Stones = 0.78ct. Graded in the setting.
Clarity SI-1 to SI-2 Color G - I
Total Weight of Colored Stones 7.67 ct. Total Weight of Diamonds 0.78 ct. Total Weight of Ring 11.21 gm