Tagua Nut as a Sustainable Botanical Alternative for Ivory
Jewelry designer Alexandra Mor uses sustainable alternatives for elephant ivory.
A Special Type of Trapiche Quartz
Three incomplete trapiche quartz make up this interesting sample.
Gemological and Chemical Characteristics of Natural Freshwater Pearls from the Mississippi River System
The Effect of Low-Temperature Heat Treatment on Pink Sapphire
Twelve pink sapphires undergo low-temperature heat treatment and reveal a correlation with the 3232 cm-1 FTIR peak.
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