FLUORESCENT HYALITE OPAL 35
A Fluorescent Hyalite Opal 35. This is a superb Aussie specimen to grace your collection. Rare to come by at this quality. Fluorescent Green under UVC light.
Squaretop Mountain, Queensland, Australia.
3.8cm x 3.5cm x 1.9cm, 19g.
SiO2 · nH2O.
A colourless variety of Opal. Hyalite is opal, an amorphous silica glass containing about 3-8% water. Hyalite occurs as globular and botryoidal masses and irregular crusts. Found in volcanic and pegmatite environments where the silica deposits from the gas phase. It often shows a strong green fluorescence in UV light.