Category: Featured Articles

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…

Diaspore

INTRODUCTION Diaspore is a mineral species with the formula, AlO(OH). It was first discovered in Sverdlovsk Oblast, Russia (the type locality) in 1801. Since the initial discovery, diaspore has been found in numerous localities around the…

An Ebay Experiment

One evening last January, I just couldn’t get to sleep. As I lay in bed wondering what I could do to pass the time, it struck me, “I will look for gemstones on eBay.” Little…

Tucson Gem Shows 2019

Tucson sets expectations for 2019. Good demand for an array of colored stones. Two industries, one new and one old. Sapphires are king but everyone loves garnets. The emeralds of Ethiopia surprisingly scarce. Emerald disclosure or blunder? The…

Pearl Varieties

Pearls are a vast subject worthy of years of study. There are nacreous and non-nacreous pearls, each with subcategories of varieties. Prices, colors, qualities, sizes are seemingly endless and it takes great effort to learn about all…