This nice material has been found in a very small quantity in the volcanic Italian island: Lipari, near Sicily.
The obsidian from this location is well know since roman’s time, this variety is quite rare. The small globular inclusions are made of rhyolitic composition,different from the matrix for a Sodium and Calcium proportion, furthermore some micro crystals were of Ulvospinel and Pyroxene . The result is wonderful: it looks like a view into the deep space.More informations on Rivista Gemmologica Italiana 1/2010
Size: 22.5x12.5x3 mm.
Weight: 10.66 ct.