The rare gem from Zacatecas Mexico is to our knowledge the largest faceted opal of its type available. Cut by Steve Moriarty this material glows not only under a ultraviolet light it will also glow strongly in daylight particularly diffused daylight. Amaze your friends with this gem that glows like kryptonite and also has the shape of supermans emblem. This large and rare gem hyalite opal measures 16 x 12 x 9.5 millimeters. See more information in the attached videos. This material is slightly radioactive, just above background levels at 100 counts per minute. Most of this radiation is non penetrating to the skin. We have to leave it up to you as to weather it is wearable on a daily basis. There are other sources of fluorescent opal but this is the only source that shows this dramatic green in daylight. You don't need to carry a u.v. flashlight to show this fluorescence.
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