Hyalite Opal Specimen -Mexico Feldspar Black Hematite: An iron oxide

Black Hematite: An iron oxide mineral that contributes metallic

Approximate Size: 4in x 3in x 2in

calling it "aschenzieher" or "ash puller

These exceptional pieces originate from the renowned Mibladen mining district in Morocco

Size:  79x60x49mm

Hyalite Opal Specimen -Mexico Feldspar Black Hematite: An iron oxideHyalite Opal on agate matrix Hyalite opal is an unusual variety of opal found in various volcanic locations around the world. Because of its unique structure, you won't find any opalescence or "play of color" that traditional opals are known for. Instead, hyalite opal impresses when viewed under both Longwave and Shortwave ultraviolet light, fluorescing a strong green color. Its formation can be classified as amorphous, botryoidal and globular. Its