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Appendix 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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Appendix 5: Simplified Tourmaline Species Classification for LA-ICP-MS Data

Simplified Tourmaline Species Classification for LA-ICP-MS Data

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Appendix 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

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Appendix 3: Calculation Method for Tourmaline Species Classification Used Here

Calculation Method for Tourmaline Species Classification Used Here

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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.

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Appendix 1: Comparison of LA-ICP-MS and EPMA Data, Part 1

Comparison of LA-ICP-MS and EPMA Data, Part 1

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A woman sits in front of a computer screen with the DiamondView to her right.
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Inside De Beers’ Lightbox Diamonds

GIA researcher analyzes and confirms that De Beers’ Lightbox diamonds are grown using the chemical vapor deposition process.

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Sapphires from Bingham Canyon (Utah) and Yogo Gulch
Gem Localities and Formation

Poster abstracts on “Gem Localities and Formation” from GIA’s 2018 International Gemological Symposium.

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Mozambican ruby with signs of heat Treatment
Colored Stones and Pearls

Poster abstracts on “Colored Stones and Pearls” from GIA’s 2018 International Gemological Symposium.

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FTIR spectrum and DiamondView images of type Ib-IaA diamond
Diamond Geology

Poster abstracts on “Diamond Geology” from GIA’s 2018 International Gemological Symposium.

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