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Gem Knowledge
Buying Guide: What Are Hardstones?
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Understanding Boulder Opal
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Understanding Specific Gravity and Why it is Vital to Gemmologists
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Historic Uses of Topaz Gemstones in Jewellery
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Understanding Play of Colour and Patterns in Opal Gemstones
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What Does It Mean When a Specimen Is Opalised?
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The Fascinating History of Antique Turquoise Jewellery
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Getting Started with Quartz Inclusions
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Understanding Iridescence in Gemstones
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Hidden Treasures: Highlights of Gem-A's Gemstones and Minerals Collection
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Understanding the Cat's Eye Effect in Gemstones
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Why Are Some Gemstones Associated with Bad Luck?
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Home
About
History
Coat of Arms
Staff
Officers and Council
Partners
Find us
Work at Gem-A
Press Releases
GemIntro
GemIntro - ENG
GemIntro - CHT
Education
Membership
Membership Types
Membership Resources
FGA & DGA Register
The Journal of Gemmology
Archive
Editorial Staff
Submissions
Sample Articles
Gems & Jewellery
Archive
Editorial Staff
Submissions
Media Pack 2023
Gem Hub
Events
All Events
Field Trips
Conference 2021
Conference 2022
Shop
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