Mexican Silver and Obsidian Brooch M468

Extremely handsome silver setting of an obsidian stone with elegant white striations. Brooch measures 4 x 3 3/4.

Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It possesses the property of presenting a different appearance according to the manner in which it is cut: when cut in one direction it is jet black; in another it is glistening gray.