Article Search Results

Show Filters
Showing 1 result for "*"

Types

Articles (1)

Content Type

Reviewed

Peer Reviewed (1)

Topics

Mineralogy (1)

Gemstones

Amethyst (1)
XClear Selections
Amethyst Mining in Brazil

David Stanley Epstein, December 1, 1988

Brazil is currently the leader in overall production of amethyst.

Read More

Resources For Retailers
Find a Retailer
learn more
Shop the Campus Store
Visit the campus shop
Learn More
Abstract art with a fluorescent rainbow and dark brown triangle patterns
Subscribe to Knowledge Rocks Emails
Learn More
The internal structures of natural pearls from the marine mollusk Pinctada maxima are the subject of the lead article in this issue. The scattered loose pearls on the cover are from Paspaley’s natural pearl collection, which includes one discovered in the 1970s at the Eighty Mile Beach fishing grounds
G&G Spring 2021 Edition
Learn more