This specimen is entirely translucent Hyalite Opal except for a little bit of dirt on the bottom that I could not clean off. The Hyalite fluoresces a brilliant green under a short-wave UV light.
HYALITE is a colorless variety of Opal. Hyalite has a different internal structure than that found in Precious Opal. Thus, Hyalite does not exhibit the opalescence that is found in Precious Opal. However, Hyalite does fluoresce green under a short-wave ultraviolet light. Hyalite occurs as globular and botryoidal masses and irregular crusts in volcanic and pegmatite environments. Hardness is 5.5 – 6 on the Mohs scale.
Location: La Ventilla, Villa de Reyes Municipality, San Luis Potosí, Mexico
Specimen Size: 1.7 x 1.1 x 0.8 inches
Specimen Weight: 0.7 ounces
Brought to you by SIDEWINDER MINERALS
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