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The pink, cushion-cut, 34.65-carat Princie Diamond used to be part of the Jewels of the Nizams of Hyderabad; it was auctioned in 2013 by Christie's and sold for US$ 39.3 million, which is the highest-recorded auction price for a Golconda diamond and a world record for US$ 1.1 million per carat. [87]
Orange topaz, also known as precious topaz, is the birthstone for the month of November, the symbol of friendship, and the state gemstone of the U.S. state of Utah. [24] Blue topaz is the state gemstone of the US state of Texas. [25] The 4th wedding anniversary gem is blue topaz and the 23rd is imperial topaz. [22]
The jewel was a "massive blue stone of 45.54-carat (9.108 g; 0.3213 oz)" [18] and weighed 177 gr (11.5 g) (4 gr (0.26 g) = 1 carat). [14] The 1812 date was just days after 20 years since the theft of the French Blue, just as the statute of limitations for the crime had taken effect.
Diamond mine in the Golconda region 1725 CE from the collection of Pieter van der Aa—a Dutch publisher known for preparing maps and atlases.. The period of peak production of the Golconda diamonds (in the present-day states Andhra Pradesh and Telangana, India) was under the Qutb Shahi dynasty (16th century – 17th century CE), and the region was also known as the "Golconda Sultanate".
There are considerable price shifts near the edges of the size bands, so a 0.49 carats (98 mg) stone may list at $5,500 per carat = $2,695, while a 0.50 carats (100 mg) stone of similar quality lists at $7,500 per carat = $3,750. Stones near the top of a size band (or rarer fancy coloured varieties) tend to be uprated slightly.
The topaz in the Field Museum (2009) The Chalmer's Topaz is a topaz gem weighing 5,899.5- carats located in Chicago, Illinois ' Grainger Hall of Gems, in the Field Museum of Natural History . It was named for former Field Museum trustee William J. Chalmers and his wife Joan Chalmers, who established a fund used to purchase gemstones for the ...