Groutite
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Groutite
Robert Mine, Crow Wing Co., Minnisota, USA
1669
Small miniature Groutite specimen, jet black crystals with mirror like lustre and up to 6mm in size. Fine specimen of this rare manganese oxide. Ex. Peter Harrison specimen
Formula: Mn3+O(OH)
Status: Sold
Dimensions: 32x23x9mm
Size: Miniature (M)
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