2.1" Polished Green-White Opal Slab - Western Australia

This is a gorgeous, 2.1" wide slab of common green opal. This form of opal comes from a location south of Kalgoorlie in the Eastern Goldfields of Western Australia. The beautiful green coloration is caused by traces of nickel and/or chromium within the mineralization. One side has been polished to a glossy finish.