Gypsum

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Eisenkiesel Quartz & Gypsum - Spain

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Sand Rose

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Gypsum and Halite

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Mint Green Selenite

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Gypsum and Halite

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Desert Rose

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White SandsBlonde mice and white lizards blend into the background in a desert of milk-white dunes.S

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Gypsum tumulus in GermanyThe great Jurassic limestone platform that covers much of Western Europe wa

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A Desert of White SandThe Tularosa Basin in White Sands National Monument is one of the world’s most

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rockon-ro:GYPSUM (Calcium Sulfate) crystals, known as “desert rose”, from Ahumada Playa, Chihuahua,

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These beauties are known as cave pearls. A cave pearl is a type of speleothem that forms in moving o

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Edge of an ergThis is a large sand sea in the Namib Desert known as an erg. Ergs form in areas where

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Mohs Scale of Mineral Hardness.The Mohs scale of mineral hardness (or the Mohs hardness scale) is us

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GypsumGypsum is an evaporite sulfate mineral, which is very soft and is easily crumbled between the

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Malachite pseudomorphing gypsumAfter minerals have crystallised, it can happen that new element lade

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Surreal gypsumGypsum is an evaporite mineral, formed by the precipitation of saturated minerals from

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Chrysocolla pseudomorphPseudomorphs are crystals of a mineral that have replaced another, often as t

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Desert rose Resembling flowers or leaves, these crystal groups are made by precipitation when lakes

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Photo: Dissolved gypsum formed this cave in Grotta del Palummaro, Italy. http://www.ldeo.columbia.ed

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