Description: Top specimen of this new botryoidal Hyalite Opal. Same material as our faceted but such a perfect specimen I couldn’t bring myself to get it cut, as it is much more amazing left natural. Great natural luster and top color in daylight. A really special gem. An exciting new find of color changing opal. A rare opal from a very small deposit in Zacatecas, Mexico. The color change comes from this opal ability to fluoresce under natural daylight, one of the only minerals to do so. Unfortunately production only yielded about 10 kilos of gem quality material (including the host rock) with such exceptional color before running dry. Stability does not appear to be an issue with this opal, as is common with Hyalite opals. I’ve personally handled large amounts of this and have not seen one stone rough or finished crack or craze. I had a discussion with the miner and he has had the same experience. Those with access can view a wonderful article in the journal of Gemology, Fritsch Emmanuel. “Green-Luminescing Hyalite Opal from Zacatecas, Mexico.”The Journal of Gemmology Journ of Gemm34.6 (2015): 490-508. Unfortunately not much else has been published on this material. I am happy to talk about and answer any questions.
Weight: 60.43 ct
Type: Electric opal from Mexico
Color: Brilliant green fluorescing in natural sunlight. Colorless to light green in indoor light.
Body Clarity: Crystal
Comment: Exceptional, rare and unique
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