San Carlos peridotite with chrome diopside and spinel in volcanic basalt, vivid gemmy color Quartz When well-formed

When well-formed

Approx weight: 252g

UV reactivity Near the geode entrance

apparently dissolved away

but later phases of growth (“second generation”) don’t contain hematite inclusions and are white

San Carlos peridotite with chrome diopside and spinel in volcanic basalt, vivid gemmy color Quartz When well-formedLocale: San Carlos Apache Reservation, Arizona Approx dimensions: 3 x 2 x 1. 5" Approx weight: 220g 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 minerals