Month: February 2016

Prehnite

Introduction Prehnite is a mineral, well known to collectors, with the formula Ca2Al2Si3O10(OH)2. Crystals are rare, typically forming with stalactitic or botryoidal habit (Fig. 1). It is not commonly seen in jewelry stores but is occasionally…

Mozambique Ruby

High prices for better corundum were easily observable during the Tucson Show this year. Although record prices are achieved at the auction level globally, there is now some pressure to keep prices down for good…

Gem Market Pulse – February 2016

The 2016 Tucson gem show had better than expected traffic and buying. North American buyers will drive the trends this year.                                                                                               …featured gem is Fire Opal The New Year got off to a shaky start as…