en.wikipedia.org/wiki/Tephroite
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Tephroite has a hardness of 6 and a specific gravity of approximately 4.1, which is heavy for non-metallic minerals. Its name comes from the Greek tephros, "ash ...
webmineral.com/data/Tephroite.shtml
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Click Here for Larger Tephroite Image · Tephroite. Comments: Sharp crystals of tephroite to 1.2 cm across. Location: N'Chwaning Mine, Kalahari Manganese ...
www.mindat.org/min-3913.html
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Fayalite-Tephroite Series , and the Forsterite-Tephroite Series .
www.galleries.com/Tephroite
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Tephroite is one of the unusual minerals found at the famous mines of Sterling Hill and Franklin, New Jersey, USA. It is named for the typical color which is ash ...
www.minerals.net/mineral/tephroite.aspx
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Detailed description, properties, and locality information guide about the olivine mineral tephroite (Franklin).
www.handbookofmineralogy.com/pdfs/tephroite.pdf
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Tephroite. Mn. 2+. 2. SiO4 c○2001 Mineral Data Publishing, version 1.2. Crystal Data: Orthorhombic. Point Group: 2/m 2/m 2/m. Crystals typically short, prismatic ...
dictionary.reference.com/browse/Tephroite
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noun a mineral, silicate of manganese , Mn 2 SiO 4 , occurring in orthorhombic crystals. Origin: 1865–70; German Tephroit Greek tephró ( s ) ash gray + German -it ...
www.britannica.com/…Bchecked/topic/587720/tephroite
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Olivine mineral found only in iron-manganese ore deposits and skarns and in metamorphosed manganese-rich sediments, such as those of Cornwall, Eng., and ...
www.irocks.com/species/Tephroite
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MD-119643 - Zincite, Calcite, Tephroite - - Archived Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA small cabinet, 9.4 x 7.4 x 3.5 ...
franklin-sterlinghill.com/palache/tephroite.stm
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Classic 1935 monograph by Charles Palache on the minerals of Franklin and Sterling Hill, New Jersey. Published by the USGS as Professional Paper 180.
