“Cotton Pearl” Imitations
An in-depth look at a new pearl simulant gaining popularity in the fashion jewelry market.
GIA Launches Newly Redesigned Consumer Website
Everything retailers and their customers need to know about diamonds just got easier to find and understand with GIA’s redesigned consumer-facing website dedicated to the 4Cs of Diamond Quality – Clarity, Cut, Color and Carat Weight – and to serve as the go-to source for gemstone information.
GIA Cultured Pearl Reports Include Traceability Information
Technology developed by Hong Kong-based Fukui Shell Nucleus Factory creates opportunities for tracing cultured pearls through the supply chain.
GIA Cultured Pearl Reports Include Traceability Information
Quarterly Crystal: Spessartine in California Quartz
A smoky brown quartz crystal from Ramona, California, plays host to a 3.3 mm reddish orange spessartine.
G&G Facebook Group Surpasses 40,000 Members
Gems & Gemology’s growing community of gem enthusiasts features content from G&G contributors, GIA researchers, and other group members.
Natural-Looking Inclusions in a Ramaura Synthetic Ruby
Milky clouds and flux inclusions in a synthetic ruby create a challenge for identification.
International Jewelry Tokyo 2024
A look at Japan’s largest jewelry trade show, International Jewelry Tokyo, held in January 2024.
Unique Fingerprint in Montana Sapphire
A group of fingerprint and crystal inclusions form the shape of a bird in a Montana sapphire.
Unusually Large Flux-Grown Synthetic Sapphire
An abnormally large flux-grown synthetic sapphire rough crystal is examined in a lab in India.
GIA Student Design Showcase
A GIA student from the New York campus receives recognition for a necklace design featuring diamonds, lavender jade, and akoya pearls.
Metallic See-Through Backing on Omphacite Jade
An unusual effect created by the backing on a jade carving is observed in the Carlsbad laboratory.
Hammered Effect in a Worked Pearl
A natural saltwater pearl displays the optical illusion of a bumpy texture.
Heliodor and Aquamarine with Surface Etching
Hexagonal etch features are observed on the prismatic faces of heliodor and aquamarine crystals.
Akoya Cultured Pearl Prize in an Arcade-Style Claw Game
Arcade-style games in Japan dispense akoya pearl jewelry as prizes.
Square-Shaped Cloud in Diamond
A natural faceted diamond displays a prominent square-shaped cloud under the table.
Large Natural Diamonds with Asteriated Cloud Inclusions
Two natural diamonds containing cloud inclusions that resemble stars are examined in the Carlsbad laboratory.
New Emerald Production from the Curlew Mine, Western Australia
GIA’s Bangkok laboratory studies emeralds from the Curlew mine’s recently renewed production.
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