Serpentine Cabochon with Unusual Olive Green Color
Large Star Emerald
An emerald reportedly from Madagascar is cut to show asterism, a rare phenomenon in this material.
Thai-Myanmar Petrified Woods
The properties of petrified woods originating from various localities in Thailand and Myanmar are examined.
Impregnated and Dyed Turquoise
Natural turquoise has been subjected to dyeing and three types of impregnation.
Rare “Star and Cross” Quartz from Brazil
Two quartz specimens showing asterism and cross-shaped inclusions are analyzed.

.jpg)


