YELLOW SAPPHIRE
Mining in the island of Sri Lanka goes back to at least 2000 years. This island has its own heritage in the gem mining arena. The island is called “Ratna Dweepa” because of the large number of variety of gems…
gemstones
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ASTERISM
Asterism” is a term, which is most commonly used in gemmology. It refers to a kind of special optic phenomenon that has been seen in several gems. When parallel, needle-like inclusions, or tube-like channels, are oriented along two or more…
PADPARADSCHA
Padparadscha is an extremely rare and most prized variety of sapphire. It is also one of the most expensive gems in the world, with prices similar to those of Alexandrites and rubies. Padparadscha has a beautiful pinkish-orange color. The term…
MAJOR HEAT TREATMENT PROCESSES FOR CORUNDUM
The oldest and most common gemstone enhancement method is the heat treatment. Heat treatment of gemstones is done to enhance their appearance. Heat treatment may change the appearance of varieties of corundum due to several reasons. To obtain the optimum…