Rare Large specimen of Olshanskyite crystals on Roweite -13.5 x 8.5 x 5.0 cm - 530gr

Rare Large specimen of Olshanskyite crystals on Roweite -13.5 x 8.5 x 5.0 cm - 530gr
Shijiangshan Mine, Ulanhad League, Inner Mongolia, China

Dimensions: 13.5 x 8.5 x 5.0 cm
Weight: 530 g

Describing this mineral cluster as rare is placing an extreme understatement; Olshanskyite, an extremely rare Borate mineral, had only been confirmed as small microcrystals until the mid 2017s when a surprise find from Shijiangshan Mine in Inner Mongolia found these pockets of borate minerals, including another already rare mineral: Roweite. Currently the Shijiangshan Mine is the only locality on Earth thus far to have produced centimeter large crystals of Olshanksyite; the other two known localities are the Fuka Mine in Japan, and Titovskoe B Mine in Siberia, Russia, both of which produces sub millimeter crystals .

This specimen had the rare opportune makeup of having both of these minerals in one sitting making this an opportunity of a lifetime to have, as well as the immense size of the specimen makes it an even harder to miss opportunity! The brown Roweite crystals are extremely well formed, resembling that of Baryte blades, while the very sharp and translucent clear Olshanskyite crystals find themselves nestled in and throughout the entire specimen with notable vugs filled with radiating sprays of these rare crystals (captured in the photos) and sitting on a crystalline Quartz matrix while showcasing the extreme sharpness of each crystal's terminations and clarity.

The chemical formula for the minerals are as follows:

Olshanskyite: Ca2[B3O3(OH)6](OH) · 3H2O
Roweite: Ca2Mn2+2B4O7(OH)6

Minerale vorm / Soort meteoriet
Kristallen op matrix
Olshanskyiite, Roweite, Quartz
Oorsprong (Regio/Stad)
Shijiangshan Mine, Ulanhad League, Inner Mongolia
Oorsprong (Land)
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