News Archive

Jeremejevite

INTRODUCTION Jeremejevite is a mineral species with the formula,  Al6B5O15(OH,F)3. It is pronounced by replacing the “J” with “Y” so phonetically, it would be “yeremeyevite.” It was first discovered in 1883 on Mt. Soktuj in East…

Reigniting Diamond Desire

Depressed demand for jewelry is hurting everyone—from miners to retailers—in the supply chain. The GemGuide talked to industry leaders to explore opportunities for change and learn how to reignite consumer passion for our product. De Beers…

The Big Three Plus Diamond

The GemGuide has now been publishing colored gemstone prices since 1982 and diamond prices since 1985. During the past 35 years, gem prices have fluctuated for various reasons. The chart that appears below is a…

Rhodochrosite

Rhodochrosite has been used as an ornamental material for carvings, beads and inlays due to its low hardness, for a very long time. Beautiful pink color contrasting with white banding in massive form is the…