Colemanite - Bigadiç - Balikesir Prov. - Marmara Region - Turkey
(#GM25038)
The surface of this specimen is covered with whitish, translucent crystals of colemanite, an uncommon borate.
Traces of this mineral are also in the underlying part of the specimen.
Specimen weight:700 gr.
Crystal size:mm. 27
 Overall size:100mm x 88 mm x 57 mm
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Owner : GMineral (Voghera - Italy)