Research Article Search Results
A Chart for the Separation of Natural and Synthetic Diamonds
“Ti-Sapphire”: Czochralski-Pulled Synthetic Pink Sapphire from Union Carbide
One of the most interesting of the commercially available Czochralski pulled synthetic corundums is pink “Ti-sapphire.”
History of Pearling in La Paz Bay, South Baja California
The history of Baja California has been closely tied to the exploitation of pearls since the 16th century.
A Visual Guide to the Identification of Filled Diamonds
This article illustrates the various features in filled diamonds and explores the best techniques for examining them.
An Update on the Ural Emerald Mines
The emeralds of the Ural Mountains, in what is now called the Russian Federation, have been known for more than 160 years.
The Yogo Sapphire Deposit
Yogo Gulch, discovered more than 100 years ago, is one of four major sapphire-producing areas in Montana, United States.
Rubies from Mong Hsu
Ruby and Sapphire from the Southern Ural Mountains, Russia
Primary occurrences of ruby, pink sapphire, sapphires of other colors, and spinel have been found in marbles in the Ural Mountains.
Update on Mining Rubies and Fancy Sapphires in Northern Vietnam
Northern Vietnam began producing significant quantities of rubies and fancy sapphires in the late 1980s.
Heat Treating the Sapphires of Rock Creek, Montana
Renewed interest in large-scale commercial mining of Montana sapphires motivated a detailed study of the heat treatment of sapphire from the Rock Creek deposit.
Update on Diffusion-Treated Corundum: Red and Other Colors
Blue diffusion-treated sapphires have become a subject of considerable controversy since their introduction in significant quantities a few years ago.
