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Central Bead Approx. Size: 8x32x52mm
Mushroom rock is a silica rich orbicular rhyolite with phenomenal orbs and patterns which will cut large and small cabochons.
When Mushroom Jasper was first discovered, it had some identity confusion. Because it was found near a deposit of Quartzite in Arizona, it was first thought to be a variety of Quartzite. Once it was determined not to be that gemstone, it was then termed a “Jasper”. Although the “Jasper” name has stuck, we now know it to be type of highly silicated Rhyolite (volcanic rock) with unusual circular formations that resemble mushrooms. Mushroom Jaspers are often seen with a brick red background that bears orbital patterns in a range of grays and browns.
Mushroom Jaspers open are found as “thunder eggs” geode like rock balls that are plain looking on the outside, but contain gemstone on the inner layers. These freeform rocks can then be cut and shaped into lovely cabochons, since they are able to take a high polish.
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