Bottinoite, Quartz, Ullmanite & Dolomite (old classic) Robertson Coll.

Dornberg Mine, Ramsbeck, Sauerland, North Rhine-Westphalia, Germany
Miniature, 4.7 x 3.4 x 2.3 cm
Start Time: 03/22/2018 6:30:00 pm (CDT)
End Time: 03/29/2018 6:30:00 pm (CDT)
Auction Closed

Item Description

A 1.2 cm, pretty blue-green cluster of spherical aggregates of bottinoite blades is aesthetically set on the side of this fine combination miniature from this well-known ancient lead and zinc mine. Bottinoite is a very rare nickel antimony hydroxide that is found in less than 10 localities in the world. The mounded matrix of mostly dolomite rhombs includes patches of metallic ullmanite, a Ni-Sb sulfosalt, scattered quartz crystals with a sprinkling of tiny marcasites being a fine accent. Ex Kay Robertson Collection # 12379 and acquired as a gift from Scott Williams in the early 1990s. Kay is a prominent California collector, who specialized in European classics (see the article in the March-April, 2007 Mineralogical Record) and the 50+ page article in the German Magazine "Mineralien-Welt" November-December 2017). Specimens of this combination quality and richness from here are RARE.

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