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Gemological Investigation of a New Type of Russian
Ilene Reinitz Emmanuel Fritsch and Mary L Johnson
Gemological Institute of America All rights reserved ISSN 0016626X
17 other sections not shown
absorption Africa alluvial Andranondambo bands Beers benitoite beryl birefringence blue blueschist cabochon California carats chrysoberyl color zoning colorless corundum crystals demantoid deposits editor EDXRF examined faceted figure fluorescence fractures Fritsch garnet gem materials Gem Trade Lab Gem Trade Laboratory gem-quality Gemological Institute gemological properties gemologist Gemology gemstones green hydrothermal hydrothermal synthetic emeralds identified inclusions inert infrared jadeite jewelry Kammerling Kiefert kimberlite Koivula lamproite light Madagascar magnified Maha DeMaggio microscope mineral mining moissanite mond natural near-colorless observed opal opaque optic orange pearls Photo by Maha piece pink pipe planes pleochroism polished production quartz Raman refractive refractive indices region rhodochrosite rocks rough ruby Russian rutile samples Sandawana Santa Monica sapphires Schmetzer seen short-wave UV showed spectra spectroscopy spectrum spinel stones surface synthetic alexandrites synthetic diamonds synthetic moissanite synthetic sapphires Tairus tanzanite techniques testing tion topaz tourmaline transparent typical X-ray yellow