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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
Species
SizeCabinet
Dimensions10.1 cm
Added on02/13/2026
Locality
Publications
- Mineralogical Record Mineral Collection University Of Delaware page 63
Known provenance
| Date | Collector | Acquisition price |
|---|---|---|
| — | Joaquin Ontiveros | Not disclosed |
| — | Donato Retana | Not disclosed |


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