30 Carat Rare Transparent Bastnasite Bastnaesite Partial Crystal
$50.00
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Description

Quantity : 1 Name : Rare Transparent Bastnasite Bastnaesite Partial Crystal Size = 18 mm x 13 mm x 11 mm Color : As shown Treatment =None Total Weight : 30 Carat Origin - Zagi Pakistan Detail-The mineral bastnäsite (or bastnaesite) is one of a family of three carbonate-fluoride minerals, which includes bastnäsite-(Ce) with a formula of (Ce, La)CO3F, bastnäsite-(La) with a formula of (La, Ce)CO3F, & bastnäsite-(Y) with a formula of (Y, Ce)CO3F. Some of the bastnäsites contain OH− instead of F− & receive the name of hydroxylbastnasite. Most bastnäsite is bastnäsite-(Ce), & cerium is by far the most common of the rare earths in this class of minerals. Bastnäsite & the phosphate mineral monazite are the two largest sources of cerium & other rare-earth elements. Bastnäsite was first described by the Swedish chemist Wilhelm Hisinger in 1838. It is named for the Bastnäs mine near Riddarhyttan, Västmanland, Sweden.Bastnäsite also occurs as very high-quality specimens at the Zagi Mountains, Pakistan. Bastnäsite occurs in alkali granite & syenite & in associated pegmatites. It also occurs in carbonatites & in associated fenites & other metasomatites. 30 Carat Rare Transparent Bastnasite Bastnaesite Partial Crystal

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