Advanced Search

GILC's Opal Committee Addresses Hydrophane Opals

Dec 27, 2012 11:58 AM   By GILC
Comment Comment Email Email Print Print Facebook Facebook Twitter Twitter Share Share

Press Release: The Gemstone Industry & Laboratory Conference (GILC) formed an Opal Committee task force at their general meeting in Tucson this past February.  Its purpose was to find useable nomenclature that could be applied to the newer hydrophane opals currently on the market. The GILC has determined that disclosure regarding this variety of opal coming from the Wollo district of Ethiopia be as follows:

Type 1 Precious Opal – Hydrophane

Special Care Required: Hydrophane generally indicates a material that is absorbent when immersed in liquid.

Keep away from cleaning agents, perfumes, oils and any liquids as they can be absorbed and may alter color and/or appearance.

Avoid sudden and extreme temperature changes. Avoid steam and ultrasonic cleaners; clean with a soft cloth.

We feel this is a concise and workable suggestion for the industry. Further, the GILC has made request that the gemological community raise the awareness and more clearly define the parameters of hydrophane tolerances. We suggest laboratories give this consideration for research.

About GILC
For more than two decades, GILC has been a platform for industry stakeholders to address and discuss important issues related to nomenclature, consumer confidence, terminology as well as the better involvement of Certification and research laboratories. GILC is an invitation-only event.


Tags: GILC, opal
Similar Articles
PragueMuseum Finds Fakes in Gem Collection
Mar 11, 2018
The National Museum in Prague has discovered a number of fake stones, including diamonds, sapphires and rubies,
Gemfields rubiesRuby Demand Robust at Gemfields Sale
Nov 16, 2017
Gemfields sold $55 million worth of rough rubies in Singapore last week, the highest revenue figure
Comments: (0)  Add comment Add Comment
Arrange Comments Last to First
© Copyright 1978-2018 by Martin Rapaport. All rights reserved. Index®, RapNet®, Rapaport®, PriceGrid™, Diamonds.Net™, and JNS®; are TradeMarks of Martin Rapaport.
While the information presented is from sources we believe reliable, we do not guarantee the accuracy or validity of any information presented by Rapaport or the views expressed by users of our internet service.