Current Bid: $20,000
Appraised Value: $71,700
One electronically tested 18KT white gold ladies cast alexandrite and diamond ring with a bright polish finish. The featured alexandrite is set within a diamond lattice gallery, supported by diamond set shoulders and completed by a two and one-half millimeter wide band. Trademark is HANA. Identified with markings of "18K". Condition is new, good workmanship.
One prong set oval mixed cut natural alexandrite, measuring 13.40 x 10.63 x 9.42mm, 8% bulge factor, exact weight 11.35ct., type II, medium dark, slightly grayish Clarity is eye clean, medium dark, very slightly grayish, yellowish green color, (GIA yG 6/3) to medium dark, very slightly brownish, yellow brown, (GIA YBr 6/3), cut is good. Transmitting light with no distortion, transparent. GIA Colored Stone Grading Report attached. Graded loose prior to setting in the GIA Laboratory, Report # 109009343016.The yellowish green color was photographed under 6000K daylight; the yellow 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 prong set round brilliant cut diamonds, measuring 2.00 - 1.80 x 1.14mm (depth est.) approximate total weight of 50 Stones = 1.24ct. Graded in the setting.
Clarity SI-2 to I-1
Color F - H
Total Weight of Colored Stones 11.35 ct.
Total Weight of Diamonds 1.24 ct.
Total Weight of Ring 9.60gm