Soon after that discovery, laboratory experiments determined that heating could improve the color of some naturally blue stones. The discovery of transparent crystals of blue zoisite in the 1960s stimulated interest in the gem. Each of these minerals occurs in a wide range of other colors. The name " ruby" is used for red to slightly purplish red specimens of the mineral corundum the name " amethyst" is used for purple specimens of the mineral quartz and, the name " emerald" is used for green specimens of the mineral beryl. This type of color-variety name is not unusual. ![]() The name "tanzanite" is used for a color variety of zoisite that ranges from blue, through violet, to violetish purple. The mineral zoisite naturally occurs in a wide range of colors that include colorless, gray, yellow, brown, pink, green, blue, and violet. Because of its growing popularity, Tanzanite was designated as a modern birthstone for the month of December in 2002. This rapid rise to popularity was accomplished mainly by Tiffany's promotion and tanzanite's beautiful blue color. It is one of a very small number of gems of any color that have been discovered and brought to strong consumer popularity within the past century. In the short time since then, it has become the second most popular blue gem after sapphire. ![]() Table of ContentsĪlthough nearly all of the world’s most popular gemstones have been known and used for hundreds of years, tanzanite was not discovered in commercial quantities until the 1960s. ![]() "Tanzanite is the most beautiful blue stone to be discovered in 2000 years." - Tiffany & Co.
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