Amethyst from Newfoundland, Canada: Geology, Internal Features, and Fluid Inclusion Microthermometry
Characterizes gem-quality amethyst from the La Manche deposit in the Avalon Zone of Newfoundland, Canada.
Classification of Gem Materials Using Machine Learning
Explores the application of several machine learning models to complement traditional gem classification approaches.
Observations of Oval-, Pear-, and Marquise-Shaped Diamonds: Implications for Fancy Cut Grading
Presents findings from observations of oval-, pear-, and marquise-shaped diamonds, laying the groundwork for a fancy cut grading system.
Akoya Cultured Pearl Prize in an Arcade-Style Claw Game
Arcade-style games in Japan dispense akoya pearl jewelry as prizes.
Hammered Effect in a Worked Pearl
A natural saltwater pearl displays the optical illusion of a bumpy texture.
Quarterly Crystal: Spessartine in California Quartz
Unique Fingerprint in Montana Sapphire
Metallic See-Through Backing on Omphacite Jade
Natural-Looking Inclusions in a Ramaura Synthetic Ruby
Cat’s-Eye Hexagonite
Dance of Light and Color: Painted Labradorite
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