Dims: 3.5 x 2.6 x 2.3" (8.8 x 6.6 x 5.8 cm)
Wt: 10.7 oz. (302 g)
Opal Butte, Heppner, Morrow County, Oregon, U.S.A.
This large hand specimen consists of a chunk of "jelly Opal", which is noticeably transparent and clear, resting on a base of common "potch" Opal. The jelly Opal shows no crystal form, but has a natural "outer surface" that is smooth and undulating. It ranges in color from a slightly milky colorlessness to a deep yellow and is essentially transparent, though being opal, it shows the standard turbidity. Where fractured, it shows the standard conchoidal curvature and a vitreous luster, but its natural faces show a duller, pearly luster. I have not seen a piece of opal quite like this one before.