Opals with an unusual purple bodycolour and strong play-of-colour have recently appeared in the market.
Read More
A new opal deposit was discovered in 2008 near the village of Wegel Tena, in the volcanic rocks of Ethiopia’s Wollo Province.
Read MoreThis section, from the Winter 2011 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read More
This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.
Read MoreA treatise on the design, display, care and repair of fine gemstones.
Read MoreThe distinctive orange-to-red “fire" opals from Querétaro have not been found in significant quantities at any other locality.
Read MoreGemmological and chemical analysis of bright green gem-quality opal from Tanzania.
Read MoreTwenty-two gem opals from a new volcanic deposit located near Bemia
Read More
“Leopard opal” consists of vesicular basalt impregnated with play-of-colour opal, and is known only from Zimapán, Hidalgo State, Mexico.
Read More
Recent mining at Opal Butte in northeastern Oregon has produced a wide variety of large flawless opals.
Read More
