Manufacture of a solid single-crystal diamond ring is a very complex and challenging process. Once material is removed from the crystal, very fine fractures and imbalanced strain can have severe ...

GIA has named John Cowley, a seasoned executive with more than 30 years of global financial and operational experience, as the Institute’s next chief financial officer (CFO), effective April 6.

The micro-world of gems lies at the very core of gemology. Information gathered from observations through the microscope serves as the very foundation for many conclusions drawn on a specimen, ...

Modern collisional tectonic events are generally initiated with subduction of oceanic crust beneath the continental crust and down into the mantle. Subduction of the oceanic crust has been linked to ...

Of all the sapphire deposits found in Montana, the richest is in the Rock Creek (Gem Mountain) district. Between 1890 and the 1930s, over 65 tonnes of rough sapphire were recovered from this area and ...

A half century ago, Akwatia was one of the most productive diamond spots on the planet. Diamonds were discovered at the nearby Birim River in 1920, when the nation was a British colony called the Gold ...

Sri Lanka has two monsoon seasons that occur at different times of the year depending on the part of the country. The northeast has monsoons from December through March. In the southwest, where most ...

Since its discovery at the beginning of the nineteenth century, infrared light has proven to be a versatile tool for scientists, industrialists, and consumers. The gem industry has benefited from the ...

Rough pink diamonds are rarely found, and although the cause of color has been correlated with plastic deformation, the precise mechanism and atomic configuration for the resulting color are topics of ...

These environmental stresses create a unique "fingerprint" within each natural diamond that is only visible under deep-UV light. Much like the growth rings of a tree, these patterns tell a story of ...

Industry analysts project that by 2025, 20% of all diamonds on the market will be laboratory-grown. Indeed, the gem industry has seen a significant increase in the quantity, size, and quality of ...

Blue zircon is perhaps best known from Cambodia, with most if not all of the material recovered as brown stones that turn blue upon heating. Recently, Brent Smith of Phoenix Gems supplied us with a ...