Research & News
Magnetite Inclusions in Star Peridot
Magnetite inclusions in a four-rayed star peridot help to date its terrestrial age.
GIA Knowledge Sessions
Engage in webinars on the most diverse and pressing issues in gemology today, including gemstone origin, laboratory-grown stones and new discoveries in field gemology.
Tree in Rock Crystal Quartz
An unusual find of orangy red staurolite crystals appear with more expected inclusions in a ruby from Mozambique.
A New Type of Rutilated Quartz Composite Product
Demand for rutilated quartz spheres in Taiwan gives rise to a new type of composite material.
Raman analysis helps to confirm the identification of a rare and lovely large blue spodumene.
Testing of a Mogok spinel demonstrates that oil can have a significant impact on clarity.