Research Article Search Results
Two Imitation Melo Pearls
GIA’s Hong Kong and Bangkok laboratories report on imitation pearls with a striking resemblance to natural Melo pearls.
Natural-Looking Inclusions in a Ramaura Synthetic Ruby
Milky clouds and flux inclusions in a synthetic ruby create a challenge for identification.
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.
Hammered Effect in a Worked Pearl
A natural saltwater pearl displays the optical illusion of a bumpy texture.
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.
Laboratory-Grown Diamonds: An Update on Identification and Products Evaluated at GIA
Reviews the advancements and major trends in laboratory-grown diamonds observed by GIA since 2007.
Update on Inclusion Scenes in Mozambican Rubies
GIA researchers identify zircon inclusions in several Mozambican ruby samples, potentially impacting origin determination criteria used for sources of East Africa ruby.
Update on Liberian Ruby
Ten Liberian corundum samples are examined in GIA’s Tokyo laboratory.
