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Variscite
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{{short description|Hydrated aluminium phosphate}} {{Infobox mineral | name = Variscite | category = [[Phosphate minerals]] | boxwidth = | boxbgcolor = #36c08f | image = Variscite-Pyrite-179447.jpg | imagesize = 260px | caption = | formula = AlPO<sub>4</sub>·2H<sub>2</sub>O | IMAsymbol = Var<ref>{{cite magazine |last=Warr|first=L. N. |date=2021 |title=IMA–CNMNC approved mineral symbols |magazine=[[Mineralogical Magazine]] |volume=85 |issue=3 |pages=291–320 |publisher=[[Mineralogical Society of Great Britain and Ireland]] |doi=10.1180/mgm.2021.43 |bibcode=2021MinM...85..291W |s2cid=235729616 |doi-access=free}}</ref> | molweight = | strunz = 8.CD.10 | color = Pale to emerald-green (pale green in transmitted light), green, blue green, yellow green, pale shades of brown or yellow, rarely red and colourless to white | habit = Encrustations and reniform masses | system = [[Orthorhombic]] | class = Dipyramidal (mmm) <br/>[[H-M symbol]]: (2/m 2/m 2/m) | symmetry = ''Pbca'' | twinning = | cleavage = [010] perfect | fracture = Conchoidal to splintery | mohs = 4.5 | luster = Vitreous to waxy | refractive = nα = 1.563 nβ = 1.588 nγ = 1.594 | opticalprop = Biaxial (−) | birefringence = δ = 0.031 | pleochroism = | streak = White | gravity = 2.57 to 2.61 | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Transparent to translucent | other = | references =<ref name=HoM>{{cite web |url=https://rruff.info/doclib/hom/variscite.pdf |title=Variscite |website=Handbook of Mineralogy |publisher=RRUFF Project}}</ref><ref name=mindat>{{Mindat |id=4156 |name=Variscite}}</ref><ref name=webmin>{{WebMineral |url=https://webmineral.com/data/Variscite.shtml |title=Variscite Mineral Data}}</ref> }} '''Variscite''' is a hydrated [[aluminium phosphate]] mineral ({{chem2|AlPO4*2H2O}}). It is a relatively rare phosphate mineral. It is sometimes confused with [[turquoise]]; however, variscite is usually greener in color. The green color results from the presence of small amounts of trivalent [[chromium]] ({{chem|Cr|3+}}).<ref name="gemselect"/>
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