Grape Agate

Grape Agate
General
Category	Mineral
Identification
Mohs scale hardness	7

Short description: Mineral that looks like grape

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]^(p75)

References

↑ "Grape Agate: What are these tiny spheres of purple quartz?". https://geology.com/minerals/grape-agate/.
↑ ^2.0 ^2.1 "Grape agate". https://www.mindat.org/min-51479.html.
↑ "What Is Grape Agate?" (in en). https://www.geologyin.com/2019/04/what-is-grape-agate.html.
↑ Wilson, James R. (1995) (in en). A Collector's Guide to Rock, Mineral, & Fossil Localities of Utah. Utah Geological Survey. ISBN 978-1-55791-336-4. https://books.google.com/books?id=t-XvE8DTiW0C&dq=grape+agate&pg=PA75.

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Original source: https://en.wikipedia.org/wiki/Grape Agate. Read more

[geo-1] "Grape Agate: What are these tiny spheres of purple quartz?". https://geology.com/minerals/grape-agate/.

[mindat-2] 2.0 ^2.1 "Grape agate". https://www.mindat.org/min-51479.html.

[geol-3] "What Is Grape Agate?" (in en). https://www.geologyin.com/2019/04/what-is-grape-agate.html.

[wilson-4] Wilson, James R. (1995) (in en). A Collector's Guide to Rock, Mineral, & Fossil Localities of Utah. Utah Geological Survey. ISBN 978-1-55791-336-4. https://books.google.com/books?id=t-XvE8DTiW0C&dq=grape+agate&pg=PA75.

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Grape Agate

Topic: Chemistry

References