Research Article Search Results

GIA Lab Reports on Low-Temperature Heat Treatment of Mozambique Ruby
Report on changes in Mozambique ruby following low-temperature heating, observed using inclusion analysis, FTIR spectroscopy, and LA-ICP-MS.

U.S. Retail Sales Remain Cautious
Caution continues so far in 2015. The numbers for jewelry retail sales, De Beer sights and Sotheby’s and Christie’s auction sales tell the story.


Jeweled Butterflies Welcome Spring

Exceptional Pink to Red Diamonds: A Celebration of the 30th Argyle Diamond Tender
Describes the extremely rare polished pink diamonds from Australia’s Argyle mine that have been sold for 30 years through invitation-only tenders.

Rough Diamond Auctions: Sweeping Changes In Pricing and Distribution
Examines the growing percentage of rough diamonds being sold through auctions, a shift that has caused price volatility while opening up supply to more manufacturers and dealers.

A Preliminary Study on the Separation of Natural and Synthetic Emeralds Using Vibrational Spectroscopy
Reports preliminary findings—based on FTIR and Raman spectrometry of more than 300 samples—on distinguishing natural and synthetic emeralds using vibrational spectroscopy.

Study of the Blue Moon Diamond
Presents spectroscopic and phosphorescence data of the Blue Moon, a 12.03 ct Fancy Vivid blue diamond discovered at the historic Cullinan mine in early 2014.

Mixed-Type HPHT Synthetic Diamond with Unusual Growth Features
Although this stone bore some superficial resemblance to moissanite, its gemological properties were consistent with HPHT synthetic diamond.

Books: Untamed Encounters: Contemporary Jewelry from Extraordinary Gemstones
Review of Mimi Lipton's Untamed Encounters: Contemporary Jewelry from Extraordinary Gemstones.


Books: Jewels of Ancient Nubia
Review of Yvonne J. Markowitz and Denise Doxey's Jewels of Ancient Nubia.




