A Unique Petrified Tree Fern from Northeast China
Documents the gemological properties, chemical composition, and appearance of petrified tree fern discovered in northeast China.
Slovak Opal: A New Life for a Historical Gem
Reports on the recent production of precious and common opal from a centuries-old locality.
Topaz from Mason County, Texas
A comprehensive look at Texas topaz, detailing its gemological and compositional characteristics and providing a basis for using trace element concentrations to identify its origin.
Bohemian Garnets as Decorative Materials for Glass Vessels from the Late Sixteenth to Early Eighteenth Centuries
Examines a technique for setting cut garnets on glass objects, invented by Claudius vom Creutz of Nuremberg in the late sixteenth century.
Micro-Features of Beryl
Provides a visual guide to the internal features of different varieties of beryl.
Suspended Crystal in Red Spinel
“Sun Spangle” in Amber
Hollandite in Amethyst
A spectacular display of hollandite crystals is captured within an amethyst cabochon.
Distinctive Feather in Diamond
A feather observed in a natural diamond resembles a large reptile.
Cross in Natural Diamond
Treated HPHT Laboratory-Grown Diamond with Dramatic Color Zoning
A Fancy Deep brownish orange treated HPHT-grown diamond exhibits multiple defect concentrations in various growth sectors.
A Remarkable 16.71 ct Transparent Orange-Yellow Sodalite
Rare Natural Bicolor Diamond
Two Foraminifera-Like Objects Found in a Natural Saltwater Pearl
Gems Recovered from Sedimentary Rocks
Explores the formation of sedimentary rocks, gems found and formed in sedimentary environments, and the alluvial mining of these gems.
Trapiche Garnet from Vietnam
A rare occurrence of 14 trapiche patterns is observed in a garnet sample from Vietnam.
A Unique Omphacite Jade Pendant
In Memoriam: Heitor Barbosa
Texas Topaz, Slovak Opal, a Beryl Inclusions Chart, and More
.jpg "YMAL GIA Ed")
