Quartz (Amethyst) - image 1

Quartz (Amethyst)

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Quartz (amethyst), 10.1 cm, from the Margarita mine, Amatitlan, Guerrero, Mexico. Amethyst was first discovered in the hills above Amatitlan around 1930 by a farmer named Donato Retana. Two branches of his family got into a feud over ownership, resulting in many deaths on both sides before ownership was settled. Most of the best specimens in the following years came from the Margarita claim filed by Joaquin Ontiveros.

Product details

SpeciesAmethyst, Quartz
SizeCabinet
Dimensions10.1 cm
Added on02/13/2026
LocalityMexico, Guerrero, Mina La Sorpressa
Publications
  • Mineralogical Record Mineral Collection University Of Delaware page 63
Current owner
The Mineralogical Museum, University of Delaware

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Previous owners
DateCollectorAcquisition price
—Joaquin OntiverosNot disclosed
—Donato RetanaNot disclosed

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Amethyst
Mineral guide
Learn about Amethyst
violet quartz prized for vivid color and crystal forms; affordable Brazilian geodes and razor-sharp Georgia crystals, with collecting localities.
Amethyst
Regional guide
Amethyst from Mina La Sorpressa
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Locality guide
Mina La Sorpressa
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