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Approx size: 1
I also find this to be one of the more active varieties
The more translucent material on this piece has stronger UV reaction
This material has the tendency to be crumbly
This Erongo specimen features a cluster of black tourmaline (schorl) between two chunky smoky quartz crystals
San Carlos peridotite with chrome diopside and spinel in volcanic basalt Pseudo-stromatolite Approx size: 1Locale: San Carlos Apache Reservation, Arizona Approx dimensions: 2. 75 x 2 x 1. 25" Approx weight: 252g While this material is commonly called peridot in (or on) basalt, it is actually more complex. It would be more accurately called a peridotite xenolith in basalt. Peridot is the gem quality version of the mineral olivine, which is common in our Earths upper mantleand even in space. In comparison, peridotite is a combination of several types of
