Scheelite

Elongated pyramidal crystals of Scheelite measuring to 7 mm are intergrown over the display surface of this rich miniature, most probably from Carrock mine by Mungrisdale in the Caldbeck Fells of Cumbria, within the English Lake District. The glued-on French label states ‘Kiswick’ [sic] (Keswick) as the location but with little doubt must be from Carrock. The Scheelite crystals are a semi-lustrous, mottled cream-pink-light brown and under SWUV fluoresce bluish white. Short wave ultraviolet also demonstrates that much of the matrix is massive Scheelite, a calcium tungstate. Under LWUV there is no fluorescence. A terrific, small miniature Scheelite from Carrock mine, a locality where mineral collecting is now strictly forbidden.