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Robertsite Carbonate-hydroxylapatite Apatite Image

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 Robertsite, Carbonate-hydroxylapatite, Apatite

Large Robertsite Image

Mineral: Robertsite: Ca6Mn+++9(PO4)9O6(H2O)6ยท3(H2O)  
Carbonate-hydroxylapatite: Ca5(PO4,CO3)3(OH)  
Apatite: Ca5(PO4)3(OH,F,Cl)
Comments: Black crystals of Robertsite on pink carbonate-hydroxylapatite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA.
Scale: Not Given.
Copyright: © Lou Perloff / Photo Atlas of Minerals
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