Dims: 1.9 x 1.6 x 1.1" (4.8 x 4.2 x 2.8 cm)
Wt: 2.0 oz. (58 g)
yowah opal field, Queensland, Australia
This lovely specimen consists of the two halves of a split "Yowah Nut" Opal. The halves show several concentric outer layers of rust-stained jasper and "potch" opal that surround a core of precious opal. Being opal, there is no crystal form, and the precious material shows a conchoidal fracture and vitreous luster. It is transparent and clear, but contains many "potch" inclusions. This precious material also shows beautiful blue and green iridescence, some of which is obviously layered.