quartz diorite - hand/display specimen of a spectacular subduction-related igneous rock
Quartz diorite is a plagioclase feldspar-rich plutonic rock, commonly speckled black and white, with biotite as the black mineral. It was emplaced during the Late Jurassic period as part of the Sierra Nevada batholith.
- The description claims that the rock is pretty.
Variants (1)
- Default Title — 9.50 USD — In stock
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