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John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.

Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.

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Colemanite

Mineral:

Colemanite: Ca2B6O11·5(H2O)

Comments:

Large crystals of brown colemanite with second generation of absolutely clear and gemmy (colorless) colemanite. Intensely fluorescent in long and short UV..

Location:

Mustafakemalpascha Mine, West-Anatolia Turkey.

Scale:

Crystal size: 1.3 x 1 cm.

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