• Tephroite - Wikipedia

    en.wikipedia.org/wiki/Tephroite Tephroite is the manganese endmember of the olivine group of nesosilicate minerals with the formula Mn 2 Si O 4.A solid solution series exists between tephroite and its analogues, the group endmembers fayalite and forsterite.Divalent iron or magnesium may readily replace manganese in the olivine crystal structure.
  • Tephroite | mineral | Britannica

    www.britannica.com/science/tephroite Tephroite, olivine mineral found only in iron-manganese ore deposits and skarns and in metamorphosed manganese-rich sediments, such as those of Cornwall, Eng., and Franklin, N.J., in the United States. Tephroite (manganese silicate; Mn2SiO4) forms a solid solution series with the olivine fayalite
  • Tephroite | Definition of Tephroite by Merriam-Webster

    www.merriam-webster.com/dictionary/tephroite Tephroite definition is - a mineral Mn2SiO4 that consists of Manganese silicate and is isomorphous with olivine.
  • Tephroite: Mineral information, data and localities.

    www.mindat.org/min-3913.html Olivine Group. Fayalite-Tephroite Series, and the Forsterite-Tephroite Series. The Mn2+ analogue of Fayalite, Forsterite, and Calcio-Olivine.
  • Tephroite: The mineral tephroite information and pictures

    www.minerals.net/mineral/tephroite.aspx Tephroite is uncommon member of the Olivine group. It is the manganese counterpart of Forsterite, and forms a series with Forsterite. Tephroite gets it name from the Greek word "tephros", meaning ash-colored, referring to its ash-gray color habit.
  • Tephroite Mineral Data

    webmineral.com/data/Tephroite.shtml General Tephroite Information : Chemical Formula: Mn2SiO4 : Composition: Molecular Weight = 201.96 gm Manganese 54.41 % Mn 70.25 % MnO: Silicon 13.91 % Si 29.75 % SiO 2: Oxygen 31.69 % O: 100.00 % 100.00 % = TOTAL OXIDE
  • Tephroite Value, Price, and Jewelry Information ...

    www.gemsociety.org/article/tephroite-jewelry-and-gemstone-information Tephroite is generally reddish brown and barely translucent. However, it takes a good polish and is massive enough to make good cabochons. Only the New Jersey and Australian localities seem to have provided such material, however. Faceted gems are unknown.
  • Tephroite - Mindat.org

    www.mindat.org/gm/3913 This specimen hosts several pristine, undamaged crystals of Tephroite in association with some tiny, pale crystals of Rhodochrosite. The Tephroite crystals consist of highly complex, etched crystals with brilliant glassy luster, gemmy clarity, and deep reddish brown color. The crystals range in size up to 1cm. Specimen size is 3.1cm x 2.4cm x ...
  • Tephrite - Wikipedia

    en.wikipedia.org/wiki/Tephrite Tephrite is an igneous, volcanic rock, with aphanitic to porphyritic texture. Mineral content is usually abundant feldspathoids (leucite or nepheline), plagioclase, and lesser alkali feldspar. Pyroxenes (clinopyroxenes) are common accessory minerals. Quartz and olivine are absent. Occurrences include leucite nepheline tephrite from Hamberg bei Neckarelz near Heidelberg, Germany, tephritic ...
  • Tephroite's Profile - Roblox

    www.roblox.com/users/96356257/profile Tephroite is one of the millions playing, creating and exploring the endless possibilities of Roblox. Join Tephroite on Roblox and explore together!oh man, wait you took it? bob, he took- I was right there, I was gonna get it- he took it right from under me oh he hates me did you hear that? yea what the hell man I've been nothing but nice to you