Sunstone is a feldspar gemstone with a glittery appearance and usually an orange or reddish color, hence its name. The glitter effect is caused by inclusions of the mineral Hematite, or sometimes also Goethite or Pyrite The term used to describe the glittery effect exhibited on Sunstone is aventurescence. Sunstone sources are in India, Norway, Russia, Madagascar and the United States (Oregon).
* Tanzanite >
Tanzanite is the blue to violet gem variety of the mineral Zoisite. Since its relatively recent discovery in 1967, it has become a mainstream and popular gemstone, and is used extensively in jewelry. To date, Tanzanite is found only in the Arusha region of the African country of Tanzania, and it was named after its country of origin. Other varieties include Yellow Tanzanite are yellow transparent Zoisite from Arusha, Tanzania. It is found in the same deposits associated with Tanzanite, and is essentially the same as Tanzanite except for its color which is different.
* Tellurium >
Native Tellurium is very rare. Only small quantities have been found in a natural state, and it is only of interest to the collector. Due to its rarity, Tellurium specimens are highly sought after by collectors. Native Tellurium is very uncommon, and is only occasionally used as an ore of tellurium where other tellurium minerals occur. Nevertheless, the uses of the element tellurium are briefly mentioned: Tellurium is used industrially for thermoelectric apparatuses and in the process of creating rubber. It is also used medically, and as a coloring for glass. Another use is as a gasoline additive to to reduce engine knock.
* Thulite >
Thulite is the pink to reddish variety of the mineral Zoisite. It is an opaque stone made up of dense crystals, and is used as a minor gemstone.Thulite is an inexpensive gemstone. It is cut into beads, and carved into ornamental objects. Thulite is popular in Norway, where it was first found. It is named after the mythical region of Thule, which many identify with Norway.
* Tiger's Eye >
Tiger’s eye is a variety of quartz and is inexpensive and very popular in the gemstone market.When polished, it’s silky luster creates a beautiful chatoyant effect of moving layers of brown and yellow lines and waves. Tiger’s Eye forms when Quartz forms over existing bluish-gray Crocidolite, and eventually entirely replaces it. The main source of Tiger’s Eye is South Africa, from the Northern Cape Province. Other, sources include Namibia, Australia, India, and Thailand. Although uncommon worldwide, the abundance of the deposits in South Africa are extensive enough to make Tiger’s Eye very affordable.
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