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5.00 ctw Blue Topaz and Diamond Ring - 18KT Yellow Gold

Currency:USD Category:Jewelry / Fine Jewelry Start Price:1.00 USD Estimated At:6,900.00 - 9,140.00 USD
5.00 ctw Blue Topaz and Diamond Ring - 18KT Yellow Gold
High End Watches, Exotic Antiques, Cars, Gold, Vintage & Collectible Coins, and Jewelry.
One electronically tested 18KT yellow gold ladies cast blue topaz and diamond ring. The ring is from Casato's St. Barth Collection. It features an elaborate blue topaz and diamond ribbon curved lattice, completed by a three and one-half millimeter wide band. There is a single round brilliant diamond set within the inside of the shank. Bright polish finish with rhodium accents. Trademark is CASATO. Identified with markings of '750'. Condition is good. Containing: Ten prong set oval and pear mixed cut natural blue topazs approximate total weight of 5.00ct., clarity is eye clean, type I, medium dark, moderately strong, very slightly greenish blue color, (GIA vslgB 6/4), cut is good. Transmitting light with no distortion, transparent. Color grade is an average for the group. Graded in the setting.A deposit of a thin layer has been applied to the topaz to produce the intense color effect. The process utilizes a very high temperature treatment, diffusion of ions into the topaz, plus in some cases neutron bombardment has been used to create the color center. Diffusion processes causes the added ions to become part of the crystal surface with no distinct boundary. Do not put a gem treated in this manner into an ultrasonic cleaner. Eighteen prong set round brilliant cut diamonds, measuring 2.00 - 2.00 x 1.20mm (depth est.) approximate total weight of 18 Stones = 0.60ct. Graded in the setting. Clarity SI-1 to SI-2. Color: F - G One Hundred Twenty-One prong set round brilliant cut diamonds, measuring 1.40 - 1.30 x 0.81mm (depth est.) approximate total weight of 121 Stones = 1.15ct. Graded in the setting. Clarity SI-1 to SI-2. Color: F - G. Total Weight of Colored Stones 5.00ct.. Total Weight of Diamonds 1.75ct.. Total Weight of Ring 12.03gm. AIG Appraised at $9,140.00.