Search results
Results from the WOW.Com Content Network
This category is for mines for cardinal gems other than Diamond, ie amethyst, emerald, ruby & sapphire, and also opal mines (see Gemstone). Subcategories This category has the following 3 subcategories, out of 3 total.
Turkey is the only place where the gem quality material has been found, [3]: 154 and at the Ilbir Dağ deposit it has been "formed in open spaces by hydrothermal remobilization of bauxite components". [1] The gem quality material was first discovered in the early 1980s. [4] Zultanite has a hardness of 6.5 to 7. [5]
It was named for mine owner James Ames. [ 4 ] [ 3 ] It occurs in an environment of low-grade metamorphism affecting rocks with high aluminium and magnesium content. It occurs associated with vesuvianite , chlorite , magnetite , rutile , diaspore , grossular , calcite , diopside and clinozoisite in various locations.
Jet is a product of decomposition of wood from millions of years ago, commonly the wood of trees of the family Araucariaceae. [5] Jet is found in two forms, hard and soft. [5] Hard jet is the result of carbon compression and salt water; soft jet may be the result of carbon compression and fresh water. [5]
Gemfields Group Ltd (formerly Pallinghurst Resources Limited) is a British mining company incorporated in Guernsey and headquartered in London, United Kingdom, and is a supplier of coloured gemstones. [5] The company specializes in the mining, processing and sale of coloured gemstones, in particular emeralds and rubies. The group sells rough ...
Ammolite is also known as aapoak (Kainah for "small, crawling stone"), gem ammonite, calcentine, and korite. The latter is a trade name given to the gemstone by the Alberta-based mining company Korite. Marcel Charbonneau and his business partner Mike Berisoff were the first to create commercial doublets of the gem in 1967. They went on to form ...
A major mining location for high purity quartz is the Spruce Pine Gem Mine in Spruce Pine, North Carolina, United States. [85] Quartz may also be found in Caldoveiro Peak, in Asturias, Spain. [86] By the 1930s, the electronics industry had become dependent on quartz crystals.
Feldspar (/ ˈ f ɛ l (d) ˌ s p ɑːr / FEL(D)-spar; sometimes spelled felspar) is a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. [3]