For sale is a hyalite opal specimen on rhyolite, from Square Top Mountain, Qld. This piece like most from this Australian hyalite location has a slight green fluorescence. While specimen of hyalite opal from this locality are far from uncommon, we acquired this one because of its very uncommon white matrix, (which must be another mineral) sitting on top of the rhyolite. Hyalite occurs as globular and botryoidal masses and irregular crusts in volcanic and pegmatite environments where the silica deposits from the gas phase, AND is notoriously hard to photograph!! This is a superb Australian hyalite specimen. Please compare our price to others available, and see which is the most attractive.
SQUARE TOP MOUNTAIN, VIA DALBY, QLD.
57 x 37 x 18mm