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The properties of precious stones

Transactions of the Optical Society, 1909
exaly  

Precious stones

Notes and Queries, 1887
exaly  

Precious Stones

1940
exaly  

Appendix 3. Precious Stones in the Paradiso

1990
exaly  

Chapter 12. Color and precious stones

1990
exaly  

Precious stones

Notes and Queries
exaly  

Chapter 5. Semi-Precious Stones

1961
exaly  
precious metals
ore
jewelry
artisanal mining
gemstones
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