Thumbnail, 2.4 x 2.2 x 1.8 cm
Mammoth-Saint Anthony Mine (Mammoth-St Anthony Mine; Mammoth Mine; St. Anthony Mine), St. Anthony deposit, Tiger, Mammoth District, Pinal Co., Arizona, USA

This is an excellent specimen of Leadhillite because the crystals are discrete and isolated, plus it has good color. The crystals are a beautiful robin's-egg blue with a very good resinous luster. The numerous crystals also have a noted classic morphology for the mineral: curved hexagonal prisms. Overall, this is a terrific specimen in terms of significance and showiness for a leadhillite for this mine. 2.4 x 2.2 x 1.8 cm