Calcite (unusual form - classic locale) Robertson Coll.

Item Description

Unusual form on this old-time 360-degree, 2-generation calcite from historic St. Andreasberg. Two aesthetically intergrown very blocky, moderately translucent 1st-generation rhombs rest on matrix with calcite. Striking helmet-like 2nd-generation glassy, gemmy colorless calcite with one water-clear face and the rest with satin lustre faces preferentially covers the 1st generation rhombs. Contacting lower on the sides has negligible impact to the overall high quality of this fine old-timer. Ex Kay Robertson Collection # 5687 and acquired from Al McGuinness in the late-1960s. It comes with a century old German label. 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 uncommon calcite style from the famous locale. The last mine closed in 1910. Modest pink calcite fluorescence.