Article Search Results

Show Filters
Showing 2 results for "*"

Types

Articles (2)

Content Type

Gem News International (2)

Reviewed

Topics

Geology (2)

Gemstones

XClear Selections
Oolitic opal block
Large Oolitic Opal Block

Nathan Renfro, April 30, 2014

The natural-colour oolitic opal is the largest of its type examined by GIA.

Read More
Summer 1990 Gem News International

June 1, 1990

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewellery manufacturing techniques and industry trends.

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