**Gem Focus (Free Subscriber)

Gem Focus - September 2019

Posted on September 5, 2019 by The Gemworld Staff

Blue Sapphire: The Backbone of the US Colored Stone Industry. Corundum is an aluminum oxide mineral that occurs in the earth’s crust in abundance. It has been known as a common abrasive called “emery” when…

Read

News Archive

Colored Stone Market

Challenges are affecting global appetite for gem products. Prices stable for finer quality natural gems. Bumpy road ahead but long-term outlook pretty positive. Mining sector fast to respond to current economic conditions. Confidence solidly behind…

Cobalt Spinel

Spinel is a magnesium-aluminum silicate that forms in the cubic system. While most gemologists are only aware of gem quality, transparent spinels, it is, in fact, a solid solution series with many different species that…

Behind the Designs

For the first in our series on innovators in jewelry design, we are focusing on Philip Zahm, president of Philip Zahm Designs. Well established as a dealer of fine gemstones for decades, Zahm has been…