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Tourmaline
Tourmalines have a variety of exciting colors with one of the widest color ranges of any gem.
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Winter 2010 Gem News International
Paraíba Tourmaline Melee: An Entry-Level Market Perspective
New Tourmaline Pockets in San Diego County’s Pala District
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.
Appendix 2: Comparison of LA-ICP-MS and EPMA Data, Part 2
Appendix 3: Calculation Method for Tourmaline Species Classification Used Here
Appendix 4: Guideline for Simplified Distribution of Site Occupancy for LA-ICP-MS Data
Appendix 5: Simplified Tourmaline Species Classification for LA-ICP-MS Data
Bicolor Double-Eye Tourmaline
Wheel of Light’s Mesmerizing Optics
Afghan Emerald, Tajik Ruby, and Clarity-Enhanced Tourmaline
