Medium Opal Elephant Hand carved medium opal elephant. From Lightning Ridge Australia. A true work of art. Opal was first discovered in Queensland, Australia in 1872 It is created when silica gel seeps into rock fractures These are excellent choices for distinctive jewelry or metaphysical uses 25 x 20 x 11 mm. Weighs grams. (1 x .8 x .4 inches. Wt: 0 ounces.) 25 ct