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A quarry of listwanite in the region of Aosta Valley, in Italy A quarry of listwanite in the region of Aosta Valley, in Italy. Listwanite (also sometimes spelled listvenite, listvanite, or listwaenite) is a rock type that forms when the groundmass of ultramafic rocks, most commonly mantle peridotites, is partially altered to carbonate minerals and cut by ubiquitous carbonate veins containing ...
Dragon Saga ( Korean: 드래곤사가 ), called Dragonica before 2010, is a free-to-play 3D side-scrolling massively multiplayer online role-playing game developed by Barunson Interactive and Gravity Interactive. Development has been ongoing since March 2006. [ 3] Operation of Dragon Saga is relegated to different publishers for their ...
Durr Al Najaf. Durr Al Najaf ( Arabic: دُر ٱلنَّجَف) is a glossy and clear gemstone from the quartz family. The name means "pearl of Najaf " as it can only be sourced from Wadi-al-Salaam ( Arabic: وادي السلام, romanized : Wādī al-Salām, lit. 'Valley of Peace') in Najaf, Iraq. The gemstone is found along the west of Najaf ...
Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including ( clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...
Chrysoprase. Chrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony (a cryptocrystalline form of silica) that contains small quantities of nickel. Its color is normally apple-green, but varies from turquoise -like cyan to deep green. The darker varieties of chrysoprase are also referred to as prase.
Hemimorphite. Polar crystals, with different or hemimorphic ends. Also coxcomb masses, mammillary, stalactitic, or massive. Hemimorphite is the chemical compound Zn 4 ( Si 2 O 7 ) ( OH) 2 ·H 2 O, a component of mineral calamine. It is a silicate mineral which, together with smithsonite (ZnCO 3 ), has been historically mined from the upper ...
FERGUSON, Mo. (AP) — Michael Brown once told his father the “world is going to know my name,” words Michael Brown Sr. still takes to heart. Friday marks 10 years since the 18-year-old was ...
Amphibole ( / ˈæmfəboʊl / AM-fə-bohl) is a group of inosilicate minerals, forming prism or needlelike crystals, [ 1] composed of double chain SiO. 4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnesium in their structures. Its IMA symbol is Amp. [ 2] Amphiboles can be green, black, colorless, white ...