Research Article Search Results
Zircon with Unusual Color-Change Behavior
The Carlsbad laboratory recently had the chance to examine a 4.60 ct cushion-cut zircon with truly unusual color behavior.
Laboratory-Grown Diamond with Internal Laser Markings
Hematite “Rose” Inclusion in Aquamarine
Recently, a 23.67 ct pear cabochon aquamarine with light greenish blue color and poor clarity was sent to the Taiwan Union Lab of Gem Research (TULAB) for identification.
Glass Imitation of Star Sapphire
Heat Treatment Effects on the Behavior of the 3161 cm–1 Feature in Low-Iron Metamorphic Yellow Sapphire
This study examines FTIR spectra of yellow sapphire heat treated in an oxidizing atmosphere to deepen its color.
Fura Gems’ Inaugural Ruby Sale
Fura Gems hosted its first sales event for rough Mozambican rubies in August and September 2021.
FTIR Observation on Sapphires Treated with Heat and Pressure
A study on heat with pressure treatment of blue sapphires reveals FTIR patterns associated with different iron concentrations.
Fossilized Shell Consisting of Emerald
HPHT-Processed Diamond with Counterfeit GIA Inscription
Careful comparison of two GIA reports reveals a fraudulent inscription on a laboratory-produced diamond presented as a natural.
Pinctada maxima Pearls from Operated Mollusks, Sudoite in Ceramic-Age Caribbean Jewelry, Persian Turquoise Field Report, and More
Dyed Non-Nacreous Pearls
Persian Turquoise: The Ancient Treasure of Neyshabur
Reports on the geology, background, and current state of mining and production at Iran’s largest turquoise mine.
