Research Article Search Results
Ruby and Sapphire from Muling, China
An emerging corundum deposit in northeastern China is discussed.
Afghan Emerald, Tajik Ruby, and Clarity-Enhanced Tourmaline
Updates on Afghan and Tajik materials, as well as treatment options to improve the clarity of various types of tourmaline.Updates on Afghan and Tajik materials, as well as treatment options to improve the clarity of various types of tourmaline.
Rare Emerald from China and Pink Sapphire from Sri Lanka
An emerald from a largely unexplored Chinese deposit is seen at Tucson, along with a pink sapphire recut after removal from a necklace.
Ring with a CVD Synthetic Melee Diamond
A round-cut specimen set in a ring is the first mounted CVD synthetic melee diamond identified by GIA.
Largest Blue HPHT Synthetic Diamond
Analysis of a 5.03 ct HPHT-grown blue synthetic diamond, the largest ever examined by GIA.
Analysis of Yellow Diamond Melee for Color Treatment and Synthetics
A parcel revealed to contain natural, treated, and synthetic diamonds reinforces the importance of identification.
Paula Crevoshay’s American Collection, Plus Jewelry with Nontraditional Gemstones
Lesser-known gem materials are seen in pieces alongside a collection created as an artistic inheritance for future generations of jewelry fans.
Emerald/Emerald Doublet
An unusual doublet consisting of two sections of natural emerald is examined the Tokyo lab.
A Fantastic Display of Phase Changes in a Sapphire’s Fluid Inclusion
Phase changes illustrate the temperature and pressure conditions in the fluid inclusion system of a Sri Lankan sapphire.
Blue Sapphires From a New Deposit Near Andranondambo, Madagascar
A recent rush in Madagascar yields new sapphire production.
Diamond Inclusion with Radiation Halo
A diamond’s inclusion, with a radiation stain shaped like a halo, is found to be monazite.
Wheel of Light’s Mesmerizing Optics
A closer look at the Spectrum award-winning pendant from Nature’s Geometry.
