Dyscrasite, Argentopyrite & Calcite (old classic) Robertson Coll.

St Andreasberg District, Lower Saxony, Germany
6.4 x 4.3 x 3.5 cm
Start Time: 09/05/2019 6:45:00 pm (CDT)
End Time: 09/12/2019 6:30:00 pm (CDT)
Auction Closed

Item Description

An old-time, RARE 360-degree sculptural small cabinet combination from the historic mines at St Andreasberg. The calcite matrix plate hosts clusters of sharp to crudely crystallized, matte charcoal-gray dyscrasite crystals. Dyscrasite was the primary silver ore from here. Scattered clusters of tiny sparkly Sternbergite (Argentopyrite) crystals are a RARE accessory. The dramatic jagged, jackstraw, lustrous, frosted calcite spikes, to 2.8 cm, are a super compliment. Sternbergite has found to be Argentopyrite from here. Comes with an OLD 1800s label on the bottom of the piece. Ex Kay Robertson Collection # 7225 and acquired from Ron Bentley in March,1974. 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). She assembled a nice suite of classics and rarities from this famed district. See the Mineralogical Record St. Andreasberg Special Issue, May-June, 2017, Vol. 48, No. 3. A fascinating and RARE combination from the famous locale. The last mine closed in 1910. Modest pink calcite fluorescence.