Tanzanite Citrine Fire Opal Necklaces in 14K Gold

Tanzanite is a member of the mineral family zoisite, which has been known about for nearly two centuries. Zoisite occurs in a number of varieties, the most sought after being tanzanite. This mineral family was named zoisite in 1805, some time after the Austrian scientist Baron Siegmund Zois von Edelstein (1747-1819) had identified the mineral in the Saualpe Mountains of Carintha, Austria. Siegmund Zois von Edelstein operated an iron mine in the Karawanken Mountains in Karnten Austria and encountered the mineral on his own property. Centuries later, the discovery of a bright blue transparent variety that we now know as tanzanite, created a lot of excitement in the specialist world.... learn more

Citrine has been popular for thousands of years and used to be revered for its rarity, though that has changed with time. The ancient Romans used it for beautiful jewelry and intaglio work. It was also very popular for jewelry in the 19th century. During the Art Deco period between World Wars I and II, large citrines were set in many prized pieces, including the massive and elaborate Art Deco inspired jewelry pieces made for big Hollywood stars such as Greta Garbo and Joan Crawford.... learn more

Mexican fire opals are named for their uniform flaming orange or cherry red body color. They are always very brightly colored, and can be a little bit cloudy to almost perfectly transparent. Transparent specimens have a good luster. Like the traditional opal, fire opals can occasionally display signs of iridescence in very bright light. Fire opals have a very low density, lower than that of glass, with which it is sometimes confused. Fire opals, like other opals, are relatively hard, rating a 5.5 to 6.5 on the hardness scale.... learn more