Mineral: Holtedahlite:
Mg12(PO3OH,CO3)(PO4)5(OH,O)6
Comments: Colorless glassy crystalline granular holtedahlite (appears gray in image) with yellow serpentinite rock and white apatite.
Location: Tingelstadtjern, Modum, Buskerud, Norway.
Scale: See Photo.
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