David Turner - Geology and Mineralogy of Gemstones

15 Chapter 15Figure 15.1 This collection of peridot gems range in weight from 3 to 311 ca...Figure 15.2 This peridot gem of fine color (bright green, little yellow unde...Figure 15.3 The crystal structure of forsterite, with SiO 4tetrahedra in blu...Figure B15.1.1 Example of polished pallasite with gemmy portions of peridot ...Figure B15.1.2 Trace element distinction diagrams by Shen to differentiate t...Figure 15.4 Lily‐pad inclusion in San Carlos (New Mexico) peridot at 45× mag...Figure 15.5 Peridotite mantle xenolith nodules hosted in tertiary‐aged basal...Figure 15.6 Geological map of Zabargad, noting the location of gem peridot i...Figure 15.7 Euhedral crystal of peridot from Zabargad, measuring 4 cm across...Figure 15.8 Turquoise in host rock matrix and as finished and polished gemst...Figure 15.9 The crystal structure of turquoise, with PO 4tetrahedra in purpl...Figure 15.10 Nodular turquoise. Photos from Keller (1990) and Chen et al. (2...Figure 15.11 Stable isotope plots of turquoise samples from a range of local...Figure 15.12 This carving of lapis lazuli from Afghanistan shows the deep co...Figure 15.13 A seam of lapis lazuli in an outcrop (left) and a close‐up phot...Figure 15.14 Geological setting of lapis lazuli mineralization near the Sope...Figure 15.15 Geology of lapis lazuli mineralization at Malaya Bystritsa, Bai...Figure 15.16 First‐ to fourth‐quality lapis and reject material from the Chi...Figure 15.17 Annotated photograph of the Chilean skarn‐related lapis lazuli ...Figure 15.18 Flow chart for provenance discrimination of lapis lazuli when c...Figure 15.19 Heat treated blue zircon (5.96 carats) from Cambodia – doubling...Figure 15.20 The crystal structure of zircon, with SiO 4tetrahedra in blue a...Figure 15.21 Distribution of gem‐quality zircon hosted in <30 Ma alkali basa...Figure 15.22 Distribution of Cenozoic alkali basalts in Southeast Asia, an i...Figure 15.23 Euhedral gemmy zircon xenocryst (7 × 4.5 × 4 mm) in host basalt...Figure 15.24 Rough zircon from Cambodia before (left) and after (right) heat...Figure 15.25 Schematic showing alkali basalt formation in the Lava Fields ar...Figure 15.26 Prismatic zircon crystal showing double termination and square ...Figure 15.27 Simplified geological map (top) of the Reichsforst and Teichelb...

16 Chapter 16Figure 16.1 Global distribution of important amber localities. Yellow is Ter...Figure 16.2 Polished Baltic amber beads showing a range of common colors fro...Figure 16.3 Geological setting (a) and stratigraphic column (b) of amber dep...Figure 16.4 Type 1 (left, fractured) and Type 2 (right, sheet) ammolite, wit...Figure 16.5 Location map of the St. Mary River Valley with working ammolite ...Figure 16.6 Type 2 ammolite with very well preserved ammonite shell, ~45 cm ...Figure 16.7 Microstructure of ammolite as seen under a scanning electron mic...Figure 16.8 Example of a “triplet” composite gemstone: (B)acking of dark opa...

1 Cover Page

2 Series Page

3 Title Page

4 Copyright Page

5 Preface

6 Acknowledgements

7 Table of Contents

8 Begin Reading

9 Index

10 Wiley End User License Agreement

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2 Geomorphology and Natural Hazards: Understanding Landscape Change for Disaster MitigationTim R. Davies, Oliver Korup, and John J. Clague

3 Remote Sensing Physics: An Introduction to Observing Earth from SpaceRick Chapman and Richard Gasparovic

4 Geology and Mineralogy of GemstonesDavid Turner and Lee A. Groat

David Turner

The University of British Columbia, Canada

Lee A. Groat

The University of British Columbia, Canada

This Work is a copublication of the American Geophysical Union and John Wiley and Sons, Inc.

This edition first published 2022

© 2022 American Geophysical Union

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