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Tourmaline
Tourmalines have a wide variety of exciting colors with one of the widest color ranges of any gem.
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Article
Guardians of Trust: GIA’s Innovative Research, Instruments and Services
GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems enter the market.
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Article
A Tropical Paradise of Ocean-Inspired Jewelry and Gemstones
Escape to a warm-water paradise in your mind with these jewels that formed in the sea, are inspired by marine life and evoke the ocean’s essence.
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Article
Headwinds Slow 2019 Vegas Business, Lab-grown Diamonds Proliferate
Decent demand for finished jewelry, but less for loose gems. Plus: Lab-grown diamonds and responsible, sustainable business practices.
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Article
Emerald: The Superstar of Trapiche Gemstones
Trapiche emeralds, which display a distinct six-spoke wheel pattern, set the standard as some of the finest and most spectacular crystals unearthed.
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A New Method for Determining Gem Tourmaline Species by LA-ICP-MS
Presents a simplified but comprehensive classification of gem tourmaline species based on quantitative measurement of six common major elements.
Read MoreAppendix 3: Calculation Method for Tourmaline Species Classification Used Here
Calculation Method for Tourmaline Species Classification Used Here
Read MoreAppendix 4: Guideline for Simplified Distribution of Site Occupancy for LA-ICP-MS Data
Guideline for Simplified Distribution of Site Occupancy for LA-ICP-MS Data
Read MoreAppendix 5: Simplified Tourmaline Species Classification for LA-ICP-MS Data
Simplified Tourmaline Species Classification for LA-ICP-MS Data
Read MoreAppendix 1: Comparison of LA-ICP-MS and EPMA Data, Part 1
Comparison of LA-ICP-MS and EPMA Data, Part 1
Read MoreAppendix 2: Comparison of LA-ICP-MS and EPMA Data, Part 2
Comparison of LA-ICP-MS and EPMA Data, Part 2
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