News & Articles

A row of five low-quality bead cultured pearls.
A Study on Improving the Surface Appearance of Low-Quality Pinctada maxima Bead Cultured Pearls

In this study, the Bangkok laboratory examined five low-quality bead cultured pearls sourced directly from a local pearl factory and characterised their features before and after processing.

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A white and purple pearl sitting in half of its shell.
Clam Chowder with a Side of Pearl

Recently, staff in GIA’s New York laboratory were astounded by two natural pearl finds on opposite coasts – one in Baja California, Mexico and one in Long Island, New York. Each find was outstanding and worthy of exploration.

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Sorting melee on white background
How Do I Know if the Fancy Melee in My Jewellery is Natural Diamond?

Find out about how GIA is addressing industry concerns over undisclosed laboratory-grown and simulated fancy melee being mixed in with natural fancy melee.

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A small house, left, and a treehouse, right, are lit up against a star-filled sky.
GIA’s Knowledge Sessions: A New Way to Share Gemmological Information

GIA Knowledge Sessions cover a variety of gemmological topics and provide an opportunity for researchers, retailers, designers and other jewellery lovers to learn in a friendly, more casual format.

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A notebook, pen, mobile phone with compass app and a digital camera sit on top of a map.
The Stories Behind the Photos: A Gigantic Aquamarine and ‘Gaudy’ Nature

Gemmological photojournalist Robert Weldon shares the stories behind some of his favourite photos.

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The symbol of medicine, the caduceus (wings on each side of the top of a staff with two snakes intertwined around it) stabbing thru the coronavirus. A garnet sits at the top of the staff.
Jeweller Creates ‘Medal of Honour’ Brooch to Recognise Coronavirus Healthcare Fighters

GIA graduate creates a commemorative brooch to recognise healthcare workers battling the coronavirus.

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