Update on Dyed Hydrophane Opal
Opal purportedly from a new deposit is found to be dyed.
New Designs from Paula Crevoshay
World-renowned jewellery artist Paula Crevoshay displays some of her newest pieces at the Tucson gem shows.
Australian Opal Beads with Blue Play-of-Colour
Boulder opal in sandstone matrix is seen as beads in Tucson.
Jewelry Television in Tucson
A look at JTV’s history, current activities and impact on the industry.
Thai-Myanmar Petrified Woods
The properties of petrified woods originating from various localities in Thailand and Myanmar are examined.
New Deposit of Black Opal from Ethiopia
The Stayish mine in Ethiopia’s Wollo province has been producing black opal since 2013.
Coated Fire Opal in the Chinese Market
An investigation of a coated fire opal recently found in the Chinese market.
Large Oolitic Opal Block
The natural-colour oolitic opal is the largest of its type examined by GIA.
Mexican Fire Opal – Tucson 2014
Fire opal production at a family-owned mine in Mexico is explored at the 2014 GJX show in Tucson.
Water Immersion Reveals Dye in Fire Opal
A simple test easily detected dye treatment in fire opal.