Research Article Search Results
Internal Structures of Known Pinctada maxima Pearls: Natural Pearls from Wild Marine Mollusks
Presents the internal characteristics of natural P. maxima pearls, obtained from real-time microradiography (RTX) and X-ray computed microtomography (µ-CT) analysis of 774 samples.
Mineral Inclusions in Sapphire from Basaltic Terranes in Southern Vietnam: Indicator of Formation Model
Proposes a formation model for sapphire from the main deposits in southern Vietnam based on the chemical composition of their mineral inclusions.
Low-Temperature Heat Treatment of Pink Sapphires from Ilakaka, Madagascar
Studies the effects of low-temperature heat treatment on inclusions in this gem material, as well as the use of FTIR spectroscopy to detect the treatment.
What Have Diamond Ages Taught Us?
Diamond ages offer insight into continent evolution spanning billions of years.
A Study on Improving the Surface Appearance of Low-Quality Pinctada maxima Bead Cultured Pearls
In this study, the Bangkok laboratory examined five low-quality bead cultured pearls sourced directly from a local pearl factory and characterized their features before and after processing.
A History of European Royal Jewel Sales, Including Sotheby’s 2018 Auction of Marie Antoinette’s Jewels
Chronicles important auctions of jewels from European royal collections over the years, with a focus on a recent high-profile sale of items that once belonged to Marie Antoinette.
Inclusion and Trace Element Characteristics of Emeralds from Swat Valley, Pakistan
Presents a detailed study of gemological properties, inclusion features, spectroscopic characteristics, and chemical composition of emeralds from this important source.
Vietnam: Shell Nuclei, Pearl Hatcheries, and Pearl Farming
Reports on a visit to a shell nucleus manufacturer and two pearl farms in northern Vietnam, which is emerging as a notable producer.
Clam Chowder with a Side of Pearl
Recently, GIA’s laboratory in New York had the opportunity to examine a fascinating pearl find and hear about an even more fascinating story.
Separation of Natural from Laboratory-Grown Diamond Using Time-Gated Luminescence Imaging
Researchers from De Beers Group Technology present a technique that expands on the surface luminescence used in the DiamondView instrument to provide additional imaging information and quickly distinguish colorless or near-colorless natural diamond from laboratory-grown diamond.
Optical Whitening and Brightening of Pearls: A Fluorescence Spectroscopy Study
Presents a study that suggests optically brightened pearls can be consistently separated from non-brightened pearls using fluorescence spectroscopy.
History of the Chivor Emerald Mine, Part II (1924–1970): Between Insolvency and Viability
Many legends are told about the history of the Chivor emerald mine.
