Category: Featured Articles

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…

Fancy Zoisite

In recent years following the continued popularity of tanzanite, fancy colors of zoisite have been increasing in demand. Pink, green, orange, and even brownish yellow colors are being sought after. Prices are rising not only…

Geuda Sapphire

GEUDA SAPPHIRE: THE PAST, PRESENT, AND FUTURE OF A TRANSFORMATIVE GEMSTONE Despite humble beginnings, geuda sapphire revolutionized the jewelry industry through its transformation from insignificant rock to dazzling gem. A simple invention led to an entirely new…