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antimony sulfosalt Franckeite consisting of somewhat "sword"-shaped crystals oriented into spherical aggregates
I love the deep almost bronze-like patina on the surface
hollow cavity on the base of the piece where a good amount of preexisting Anhydrite once grew
) and aren't just a big intergrown mass or a loose group off matrix
This area has long produced some of the finest Topaz specimens in recent memory from the standpoint of color
Opal Replacing Bivalve Fossil US minerals antimony sulfosalt Franckeite consisting ofOne of the great classics in terms of Australian Opal. The myriads of Opal found in Australia ranges from the finest Black Opals in the world to many precious multi color Opals including what I believe are the most iconic Opal fossil pseudomorphs extant. This piece was mined in the mid 1960s and features a well preserved bivalve mollusk shell which has been not only fossilized but partially replaced by gemmy multi color Precious Opal. The top portion
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