Color In Gems: The New Technologies
A discussion of work being done to enhance color in gemstones, as well as techniques used at the California Institute of Technology to detect whether colors are natural or enhanced.
哥伦比亚的祖母绿 (英语)
A comprehensive review of the history and geology of Colombian emeralds together with descriptions of some of the most famous gems to come from this locality.
Zabargad: The Ancient Peridot Island in The Red Sea
A report on the island of Zabargad and the peridot for which it is known.
Iolite from the Thor-Odin Dome, British Columbia, Canada: Geology, Chemical Composition, Inclusions, and Cause of Chatoyancy
Reports on the geological setting and gemological properties of violet-blue gem cordierite from new deposits located in British Columbia.
Translucent Ruby Filled with Zinc Glass
Fissure with Moiré Pattern in Spinel
A precipitation of an unidentified mineral creates a complex moiré pattern in a fissure of a purple spinel.
Etch Pits in Heliodor and Green Beryl from the Volyn Pegmatites, Northwest Ukraine: A Diagnostic Feature
Examines dissolution features of heliodor and green beryl from a Ukrainian pegmatite field and offers criteria to distinguish them from samples found in other localities.
Hydrothermally Grown Synthetic Aquamarine Manufactured in Novosibirsk, USSR
Natural Rubies with Glass-Filled Cavities
Separating Glass-Filled Rubies Using the DiamondView
The DiamondView instrument is able to identify glass as the filler in a pair of heart-shaped rubies.
Fraudulently Inscribed Synthetic Moissanite
The Mumbai laboratory finds a fraudulent GIA inscription on synthetic moissanite.
Unusual Purple Fluid in Quartz
Numerous negative crystals in a pear-shaped quartz host brightly colored purple liquid.
Cause of Color in Yellow Sapphire, Plus Characterization of Oregon Sunstone, Ukrainian Beryl, and British Columbian Iolite
Aquamarine with Zigzag Growth Line Inclusions
Blackish Green Omphacite Jade from Guatemala
A Guatemalan jade called yongchuliao has gained popularity among Chinese buyers.
Chicago Responsible Jewelry Conference
A report on the seventh annual Chicago Responsible Jewelry Conference.
Turquoise United Conference 2023
Eclogite: Diamond-Encrusted Ancient Seafloor
Explores eclogitic diamonds, which make up a significant portion of the gem diamond market, and what they reveal about Earth’s dynamic processes.
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