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Article

Discover Mozambique’s Montepuez Ruby Mine with GIA’s Field Gemmologists

GIA staff, September 25, 2015

See inside the world’s most productive ruby mining operation with GIA’s field gemmology team.

Article

On the Trail of Africa’s Hidden Gems with GIA’s Field Gemmologists

GIA Staff, November 6, 2015

Visit gem mining areas in Madagascar, Kenya, Tanzania, Zambia and Mozambique with GIA’s field gemmologists.

Man stands in front of an audience giving a lecture – projection screen with image to his right.

Article

Not All That Glitters is Gold — Sometimes it is Mozambican Rubies

Phoebe Shang, March 9, 2020

Learn about Mozambican rubies, including their mining history, characteristics and market demand.

A miner holds an emerald in the mine office in the village of Coscuez, Colombia. Photo by Eric Welch/GIA

Article

Emeralds: Colombia’s Buried Treasure

Sharon Bohannon, August 21, 2015

Colombia is home to a rainbow of gems, but emeralds – and the tales of lore that surround them – are the country’s most well-known treasures.

A pile of near-colorless HPHT synthetic melee

Article

Diamond Market Forecast: Declining Credit, Soft Prices and Lab-Grown Diamonds

Russell Shor, February 18, 2019

Despite the generally strong year for jewellery retail, the diamond industry continues to face problems with credit, patchy demand and soft prices.

Shoppers walk in a mall past a Chow Tai Fook jewelry store.

Article

Season’s Sales: US Up 4% to 5%, But China Continues to Lag

Russell Shor, January 21, 2019

The US holiday season saw strong sales, but China continues to struggle. Plus: diamond market report and lab-grown diamond sales.

A large pear shaped yellow diamond hangs from a black cord and lies against red material.

Article

US Holiday Season Opens Well, Despite Volatile Markets

Russell Shor, December 10, 2018

The US holiday shopping season is looking positive, despite signs that an economic slowdown may be coming in 2019. Plus, more auction sales records.

A large piece of rough, left, with a portion cut out of it, and six cut and polished diamonds produced from the cut out piece of rough.

Article

Chipping Away at 1,109 ct Lesedi La Rona

Russell Shor, November 13, 2018

Graff reveals the first polished diamonds produced from the Lesedi La Rona, one of the largest pieces of rough ever mined. Plus, other market news.

Update on Gemstone Mining in Northern Mozambique

Wim Vertriest and Vincent Pardieu, January 27, 2017

Recounts an expedition to Mozambique’s important deposits of ruby, spinel and tourmaline, which have yet to be fully explored.

Article

Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

Russell Shor, February 1, 2016

G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.

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