Imitation Opal with Interesting Play-of-Color Pattern
New imitation opal displays pronounced play-of-color phenomenon in a unique pattern covering large surface areas.
Faceted Chiolite
A very rare faceted “snow stone” was recently encountered in the Carlsbad laboratory.
Vlasovite
A rare faceted vlasovite is encountered for the first time at the Carlsbad laboratory.
Dislocation Chain in Oregon Sunstone
A decorated dislocation chain encountered in Oregon sunstone follows an interesting rectangular pattern.
Recrystallization of Baddeleyite as an Indicator of PHT (“HPHT”) Treatment in Sapphire
High baddeleyite content in heated sapphire may signal PHT (“HPHT”) treatment.
Fall 2019 G&G Publication Information
This document provides the publication information for Gems & Gemology