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People meet and mingle at the entrance to the JCK Show.

Article

Headwinds Slow 2019 Vegas Business, Lab-grown Diamonds Proliferate

Russell Shor, June 14, 2019

Decent demand for finished jewellery, but less for loose gems. Plus: Lab-grown diamonds and responsible, sustainable business practices.

Amber and plastic reactions to illumination.

Plastic Amber Imitation in a Rosary

Nazar Ahmed Ambalathveettil, Mohamed Karam, and Sutas Singbamroong, May 8, 2017

Examination reveals both amber and Bakelite plastic beads in a rosary submitted for identification.

Steam-dyed “chicken-fat yellow beeswax” amber.

Steam-Dyed Amber

Yamei Wang, Fen Liu, Shufang Nie, and Andy Shen, August 3, 2016

Testing identifies a new treatment method as the cause of colour in beeswax amber.

Inclusions in Burmese Amber

Victoria Raynaud, Vincent Pardieu, and Wim Vertriest, August 3, 2016

Examples of Burmese amber specimens with well-preserved inclusions that have become available in recent years.

Article

Good Luck Charms

March 11, 2016

Gems and jewellery are often used as good luck charms because they can evoke power and positivity. Check out these lucky charms used around the world.

34th International Gemmological Conference

James E. Shigley, February 1, 2016

A report from the 34th IGC, held in Vilnius, Lithuania in August 2015.

Blue amber beads from the Dominican Republic

Colour Phenomena of Blue Amber

Yan Liu, Guanghai Shi, and Shen Wang, July 25, 2014

Investigates the presence of fluorescence, rather than iridescence, as the cause of colour in blue amber from the Dominican Republic and Indonesia.

Experimental Studies on the Heat Treatment of Baltic Amber

Yamei Wang, Mingxing Yang, and Yiping Yang, July 25, 2014

Amber samples were heat-treated, using various procedures and parameters, in an effort to reproduce materials found in the jewellery market.

Composite amber with an unusual structure

Jie Liang, Haibo Li, Taijin Lu, Meidong Shen, and Jun Zhang, January 31, 2014

This 9.12 gram amber composite featured a combination of natural and imitation amber, accompanied by natural and artificial insect inclusions.

Amber with Insect-Bearing Filling

Sutas Singbamroong, October 17, 2013

Natural amber beads were found to have been filled with plastic and a variety of insects.

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