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Grape Agate

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Grape Agate
General
CategoryMineral
Identification
Mohs scale hardness7

Grape Agate is a market name for purple aggregates of tiny quartz crystals with botryoidal (spherical) habit.[1] Mineralogically speaking, grape agate is not an agate[2] and is actually botryoidal purple chalcedony.[3]

It occurs in Indonesia[2] and has also been found west of the Green river in Utah.[4]: 75 

References

[edit]
  1. ^ "Grape Agate: What are these tiny spheres of purple quartz?". geology.com. Retrieved 2021-11-11.
  2. ^ a b "Grape agate". www.mindat.org. Retrieved 2021-11-17.
  3. ^ "What Is Grape Agate?". Retrieved 2021-11-20.
  4. ^ Wilson, James R. (1995). A Collector's Guide to Rock, Mineral, & Fossil Localities of Utah. Utah Geological Survey. ISBN 978-1-55791-336-4.