At-A-Glance
Photos
Essential Information
Specimen ID
6715
Mineral Name
Quartz
Mineral Variety
Amethyst
Chemical Formula
SiO2
Subcollection
Carl ‘64 and Edna S64 Heimowitz
Donation
Additional Details
Associated Minerals
Anhydrite
Notes
This specimen contains majority Quartz pseudomorphs after Anhydrite (CaSO4) over Quartz var. Amethyst (SiO2).
White Quartz pseudomorphs after bladed Anhydrite crystals (the Anhydrite formed first, and then was replaced by Quartz) on translucent-to-translucent light-to medium-purple Amethyst Crystals. Fanning white Quartz pseudomorphs after Anhydrite on contrasting glassy Amethyst Crystals. Alto Uruguai, Irai, Rio Grande du Sol, Brazil. 14 x 8 cm.
Physical Description
Quartz pseudomorphs after Anhydrite (CaSO4) over Quartz var. Amethyst (SiO2)
Geographic Origin
MinDat Locality URL
Additional Details
Historical Region Name
Alto Uruguai, Irai, Rio Grande du Sol
Original Attributed Locality
Brazil
Rio Grande du Sol