Approaching his 50th anniversary in the business, Stephen M. Avery (Lakewood, Colorado) reflected on his journey to becoming an award-winning lapidary artist, detailing his signature cuts and gem sets and offering advice to up-and-coming gemstone cutters.

Two inclusions appear joined in a diamond host.

GIA 博物馆展出的当代珠宝作品由美国珠宝设计协会捐赠。

At age 79, Bob Halem loves reminiscing about the serendipity that brought him into the world of colored stones.

Jeff Mason provides us with a fascinating look into a sometimes-misunderstood gem and its often-unpredictable market.

A precious cat’s-eye boulder opal from Australia is examined in the Carlsbad laboratory.

Presents a comprehensive analysis of the gemological, spectroscopic, and trace element characteristics of a set of Shaanxi emerald samples based on standard and advanced gemological methods.

Reports on a new source of primary gem-quality sapphire from Montana, comparing its inclusions and trace element chemistry with those from secondary sources in the state.

Blue needle-like inclusions are analyzed in three quartz spheres.

Fungal inclusions are studied in two specimens of Burmese amber.

Immiscible two-phase fluid inclusions are investigated in a 0.48 ct Paraíba tourmaline.

A diamond ring from a claw game in Japan is analyzed.

A combination of growth and dissolution features contribute to a yellow diamond’s unique shape.

A study analyzing the thermal behavior of the 3161 cm^–1 IR feature in 10 natural corundum samples from various deposits.

A summary of presentations from 24 industry-leading experts at Converge.

Examines samples of Mona Lisa turquoise to identify their chemistry and structure, revealing copper as a major elemental component of the material.

GIA offered a variety of hands-on sessions for attendees during the Converge conference.

Examination of four heart-shaped pearls reveals cavity filling and plugging to improve durability.

A 63.17 ct dumortierite rough crystal is examined in the Bangkok laboratory.