Inclusions in Natural, Synthetic and Treated Ruby
Provides a visual guide to the internal features of natural, synthetic and treated rubies.
Flux-Induced Fingerprint Patterns in Synthetic Ruby: An Update
Some manufacturers are known to have treated Verneuil flame-fusion synthetic rubies by immersion in a flux melt to induce patterns like the “fingerprints” seen in some natural rubies.
New Rubies from the Morogoro Area, Tanzania
The authors present the mineralogical and gemmological properties of rubies found recently in the Morogoro area of Tanzania that have many features in common with rubies from Myanmar (Burma) and other comparable marble-type deposits.
Rubies and Fancy Sapphires from Vietnam
Gem-quality rubies and pink to purple sapphires are being recovered from the Luc Yen and Quy Chau mining regions of Vietnam.
Carbon Dioxide Fluid Inclusions as Proof of Natural-Coloured Corundum
An important clue in identifying natural-coloured corundum is the presence of carbon dioxide fluid inclusions.
Natural Rubies with Glass-Filled Cavities
An examination and analysis of 15 natural rubies with glass-filled cavities.
This article reports the results of a series of experiments conducted to explain the phenomenon of induced fingerprints.
The Chanthaburi-Trat Gem Field, Thailand
Thailand has become the world's major source of gem ruby.
New Synthetic Rubies Made by Professor P. O. Knischka
A new synthetic ruby is discussed.
Gemstones of Pakistan: Emerald, Ruby and Spinel
This article reports on three gem materials currently being mined in Pakistan.