Article Search Results

Show Filters
Showing 1 result for "*"

Types

Articles (1)

Content Type

Reviewed

Peer Reviewed (1)

Topics

Gemstones

Amethyst (1)
XClear Selections
Artificially Induced Colour in Amethyst-Citrine Quartz

Kurt Nassau, March 1, 1981

A new and rather unusual gem material and possible treatments are discussed.

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