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Leaf Motifs: Timeless Beauty for All Seasons of Jewelry

The humble leaf has captivated jewelry designers for centuries and they’ve transformed it enduring pieces of beautiful jewelry.

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A round, bright red gem displayed on a dark gray background.
Article
The Red Hot Gems of Summer

These red, pink and orange hued gems evoke passion and excitement – and are surefire accessories for sultry summer days.

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Rough blue spinel crystals from Luc Yen
Blue Spinel from the Luc Yen District of Vietnam

Offers geological context and gemological characterization of this increasingly popular vivid blue spinel from northeast Vietnam.

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Vanadium and Chromium-Bearing Pink Pyrope Garnet: Characterization and Quantitative Colorimetric Analysis

This type of pink pyrope garnet, believed to have been mined in Tanzania, shows a distinct color-change phenomenon resulting from its unique chemical composition.

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Star rhodochrosite from the Sweet Home mine, Colorado
Colored Stones and Pearls

Abstracts of speaker presentations from the “Colored Stones and Pearls” session of GIA’s 2018 International Gemological Symposium.

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Canary yellow diamond
Diamond Identification

Abstracts of speaker presentations from the “Diamond Identification” session of GIA’s 2018 International Gemological Symposium.

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CLIPPIR diamond from Angola’s Lulo mine
Gem Characterization

Abstracts of speaker presentations from the “Gem Characterization” session of GIA’s 2018 International Gemological Symposium.

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Gem miner with Burmese gems from Mogok
General Gemology and Jewelry

Abstracts of speaker presentations from the “General Gemology and Jewelry” session of GIA’s 2018 International Gemological Symposium.

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Drilled natural pearls examined in this study.
Saltwater Pearls from the Pre- to Early Columbian Era: A Gemological and Radiocarbon Dating Study

Examines 85 saltwater natural pearls, reportedly harvested from the Caribbean islands off the coast of Venezuela during the early 16th century, to determine their age.

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Dalmatian stone samples
True Colors of “Dalmatian Jasper”

Discusses the mineralogical composition and provenance of this spotted decorative gemstone.

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