Dyed Marble as a Purple Sugilite Imitation
Investigation of a purple bangle identified it as a dyed marble imitation of sugilite.
Unusual Composite Ruby Rough
In this composite, synthetic ruby rough attached to two natural ruby slabs was fashioned to imitate natural material.
Demantoid from Baluchistan Province in Pakistan
Nine demantoids reportedly from a new deposit in the Khuzdar area in Pakistan’s Baluchistan province were recently examined.
Dyed Green Marble Imitating Jadeite
What appeared to be high-quality jadeite was actually dyed green marble with calcite as the main mineral.
Coated Lawsonite Pseudomorphs Presented as Chromian Lawsonite
Samples composed of lawsonite pseudomorphs were coated to make them appear deep green and imitate chromian lawsonite crystals.
New Deposit of Black Opal from Ethiopia
The Stayish mine in Ethiopia’s Wollo province has been producing black opal since 2013.
The First Identified Non-Nacreous Beaded Cultured Pearl
A report on what appears to be the first non-nacreous beaded cultured pearl examined by a laboratory.
Record Prices at Gem Auctions
Auction price records were broken in late 2014 as ultra-wealthy buyers vied for rare, important gemstones.
An Unusual Doublet Set in Fine Jewelry
An oval-shaped faceted stone resembling an emerald proved to be a doublet with a beryl top and a topaz bottom.
Gem Session at 2014 GSA Meeting
Online Diamond Sales 17% of U.S. Market
According to a recent De Beers study, online sales of diamond jewelry comprise about 17% of the market in the U.S.
Pearl Newsletter: Margaritologia
Margaritologia, a quarterly newsletter on pearls, was recently launched by Elisabeth Strack.
Unusual Short-Wave UV Reaction in Synthetic Blue Spinel
A blue synthetic spinel grown by the Verneuil process displayed the short-wave UV reaction of a flux-grown sample.