Formation of the “Matryoshka” Diamond from Siberia
A freely moving diamond crystal completely enclosed in a diamond from Siberia gets its name from the famous Russian nesting dolls.
Burmese Star Peridot
A rare Burmese star peridot cabochon is characterized by a soft four-rayed asterism and extremely fine acicular inclusions.
A Quantitative Description of the Causes of Color in Corundum
Presents a quantitative means of determining the causes of color in a gem material, using corundum’s six major chromophores as an illustration.
Nephrite Jade from Multiple Sources
Green nephrite deposits are found at many locations around the globe, with British Columbia, Siberia, and northwestern China as the leading producers.
Triplite in Beryl
Orange crystal inclusion identified as the rare mineral triplite in a beryl from Pakistan.
Russian Emerald
Untreated Russian emeralds, rarely seen in the market, demonstrate a range of color and degree of fineness.
Fine-Quality Jadeite Jewelry
Inclusions resembling snowflakes, and hues of many colors, are two characteristics seen in fine-quality jadeite specimens on offer at the Tucson gem show.