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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] Synthetic topaz can be produced using a method that includes the thermal hydrolysis of SiO 2 and AlF 3. [26] When these compounds are heated to temperatures of 750° to 850 °C topaz is formed.
In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
American Golden Topaz, the largest cut yellow topaz, weighing nearly 23,000 carats (4.6 kg). Chalmers Topaz , a 5,899.5-carat (1.17990 kg) cut topaz. Tsavorite
Shane & Co. offers free resizing and a warranty for life as well as free cleanings and lost stone replacements. $1625.00 at Shane & Co. 5.02ct East-West Cushion Diamond Button Back Ring
Citrine “A powerful gemstone crystal in a range of deep yellows, oranges, and yellow-cream-white, the citrine gemstone is said to bring abundance and wealth into one’s life,” Salzer says.
Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 hide