Milarite, Adularia (Var: Valencianite)
Valenciana Mine, Guanajuato, Mun. de Guanajuato, Guanajuato, Mexico
Small Cabinet, 6.7 x 6.2 x 2.2 cm
Milarite is a rare beryllium silicate. This is a classic, old-time and showy combination piece of a couple of pastel-yellow milarite crystals, to 8 mm, along the edge of a plate of off-white valencianite crystals. Valencianite is a unique variety of adularia (orthoclase) named after the famed Valenciana Mine at Guanajuato, Mexico. Ex. Harvard and George Elling Collections.