Bi-colored Fluorite (old - fluorescent) Robertson Coll.

Item Description

Aesthetically clustered, stepped-growth, transparent to translucent bi-colored cubes with frosted faces, to 4.5 cm, form a rich and showy mounded small cabinet fluorite specimen. The cubes have typical for the locale transparent gray corners with hints of pretty light lavender around veiled white centers. Fluorite specimens of this richness and quality are uncommon from this well-known, old Alston Moor mine, intermittently active from 1770 until the early 1900s. Choice, nearly pristine material, with only one gently bruised corner and an edge. BRIGHT blue-white fluorescence. This fine old-time piece is undoubtedly from the Smallcleugh Mine, not the Coal Cleugh Mine named on Kay Robertson's label # 360 and the 1920s to 30s label from prominent Austrian dealer, Anton Berger, that comes with the piece. Acquired from Burminco in the 1950s. 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). Valued at $500.