Hyalite is an amorphous type of Opal that is associated with volcanic activity. It is very clear and glassy and typically takes a globular form. Unlike it's more famous cousins, this form of opal rarely shows any color play. Hyalite is also known as "Water Opal", Jalite, or "Muller's Glass" - the latter after the man who discovered it.
Hyalite contains trace amounts of uranium, which makes it very mildly radioactive. It fluoresces a bright green under UV light, like "Vaseline Glass" does. The amount of fluorescence varies according to how much uranium is present - some glow strongly, some weakly.
The specimen being offered here is a high-grade individual that has been hand selected for clarity, shape, and reactivity. This piece has it all. It is very clear and is highly UV reactive - it glows so bright that it was difficult to photograph under UV. It weighs approx. 17 grams.
Refer to the photos. The black centimeter cube is shown for scale and is not included. You are purchasing the specimen shown. Your purchase will include an ID label.
