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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.

Article

Jeweller Creates ‘Medal of Honour’ Brooch to Recognise Coronavirus Healthcare Fighters

Amanda J. Luke, May 14, 2020

GIA graduate Franco Valobra creates a commemorative brooch to recognise healthcare workers on the front line of the coronavirus battle for survival.

A ruby and diamond choker. The centre section is made of six strands of red pearls, framed by rubies and diamonds.

Article

Mughal Jewels Auction: Al-Thani Collection Raises $109 Million (£87.5 Million)

Russell Shor, July 16, 2019

Collectors from around the world descended on Christie's Maharajas & Mughal Magnificence auction of the jewels from the Al-Thani Collection on 19 June.

Article

Coloured Stone Cut Quality: What to Look For

Al Gilbertson, August 9, 2018

Part 5 of 5 in the series “Value Factors, Design, and Cut Quality of Coloured Gemstones (Non-Diamond)” explores craftsmanship’s bearing on cut quality.

Article

Factors in Coloured Stones that Interact to Affect Value

Al Gilbertson, August 9, 2018

Part 4 of 5 in the series: Value Factors, Design, and Cut Quality of Coloured Gemstones (Non-Diamond). This article digs deeper into cutters’ choices and explores additional factors used in the trade to assess relative value.

Article

Coloured Stone Darkness & Brightness

Al Gilbertson, August 9, 2018

Part 3 of 5 in the series: Value Factors, Design, and Cut Quality of Coloured Gemstones (Non-Diamond). This article examines how cutting decisions can have a profound affect on a gemstone’s colour quality.

Article

Gem Cutting Styles - Definitions

Al Gilbertson, August 9, 2018

Part 2 of 5 in the series: Value Factors, Design, and Cut Quality of Coloured Gemstones (Non-Diamond). This article establishes a common language for discussing cutting styles, with a focus on basic faceting styles, and offers a short discussion on cabochons and beads

Gubelin Collection 74703 partial 636x358

Article

Coloured Gemstone Value Factors

Al Gilbertson, August 9, 2018

Part 1 of 5 in the series: Value Factors, Design and Cut Quality of Coloured Gemstones (Non-Diamond). This article discusses the major value factors that affect the price of a coloured gemstone.

Gerd Dreher agate lily and Patrick Dreher citrine mouse

Gem Virtuosos: The Drehers and Their Extraordinary Carvings

Robert Weldon, Cathleen Jonathan, and Rose Tozer, January 26, 2018

A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.

Article

A Case of Mistaken Identity?

Sharon Bohannon, October 20, 2017

Don’t judge a gem by colour alone. Many clues can help you identify gems of similar colours.

Horn shaped jewel pendant featuring emeralds, rubies, diamonds and pearls, and shows engravings in Arabic.

Article

Centuries of Opulence: Jewels of India

Alice Keller and Terri Ottaway, October 11, 2017

Learn about the journey of gemstones used to create the fabulous Indian jewellery featured in this special exhibition at GIA in Carlsbad.

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