zirkelite
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Zirkelite — is an oxide mineral with formula: (Ca,Th,Ce)Zr(Ti,Nb)2O7. It occurs as well formed fine sized isometric crystals. It is a black, brown or yellow mineral with a hardness of 5.5 and a specific gravity of 4.7.Zirkelite was first discovered in Brazil … Wikipedia
zirkelite — … Useful english dictionary
List of minerals U-Z (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… … Wikipedia
Rutile — Wine red rutile crystals from Binn Valley, Switzerland (Size: 2.0 x 1.6 x 0.8 cm) General Category Oxide minerals … Wikipedia
Ilmenite — from Miask, Ilmen Mts, Chelyabinsk Oblast , Southern Urals, Urals Region, Russia. 4.5 x 4.3 x 1.5 cm General Category Oxide mineral … Wikipedia
List of minerals — This is a List of minerals for which there are Wikipedia articles. Mineral variety names and mineraloids are to be listed after the valid minerals for each letter.For a complete listing (about 4,000) of all mineral names: List of minerals… … Wikipedia
Ferdinand Zirkel — Infobox Scientist name = Ferdinand Zirkel box width = image width =150px caption = Ferdinand Zirkel birth date = March 20, 1838 birth place = Bonn death date = June 12, 1912 death place = residence = citizenship = nationality = German ethnicity … Wikipedia
Andradite — single crystal (4.2cm) Diakon, Nioro du Sahel Circle, Kayes Region, Mali General Category Garnet group … Wikipedia
Aenigmatite — General Category Silicate mineral Chemical formula Na2Fe2+5TiSi6O20 Strunz classification 9.DH.40 Cr … Wikipedia
Nenadkevichite — is a rare silicate mineral containing niobium with formula: (Na,Ca)(Nb,Ti)Si2O7·2H2O. It forms brown to yellow to rose colored orthorhombic dipyramidal crystals with a dull to earthy luster. It has a Mohs hardness of 5 and a specific gravity of 2 … Wikipedia
