Malachite ps. Azurite, with Quartz covering
Thumbnail, 2.5 x 2.0 x 1.1 cm
Piedmont Mine, Brooklyn Peak, Yavapai Co., Arizona, USA

An enchanting and rare thumbnail with great form and mineralogical interest, both. The original Azurite crystal was replaced by Malachite, and that pseudo was subsequently coated by sparkling microcrystalline Quartz, as if in a winter ice storm. The aesthetics of this 2.5 cm combination are quite good. Old collection material.