Research Article Search Results

The Bangkok laboratory recently identified a pyrope-almandine garnet in a sapphire host.

Fluorite inclusions in emeralds from various localities have been reported extensively in the literature.

The appearance of curved banding under short-wave UV easily identifies flame-fusion synthetic sapphire.

Although opals generally contain water in their structure, fluid inclusions large enough to be resolved with the microscope are rare; those that can be seen with the unaided eye are exceedingly rare.

A 7.54 ct natural emerald containing a 3D helical inclusion is examined by the Tokyo laboratory.

Topaz is an important gemstone that occurs in various colors.

A study of these pearls to characterize their distinctive flame structure and examine the possibility of rotation during their formation or growth.

Examines the basic characteristics of kimberlites and their relationship with diamonds.

Provides a visual guide to the internal features of natural, treated, synthetic, and imitation opal.

Two pearls presented a unique challenge, as testing at three different gemological laboratories could not conclusively identify them as natural or cultured, determine a freshwater or saltwater growth environment, or specify the producing mollusk.

Characterizes black nephrite from a deposit in the Guangxi region that appears to be part of a large-scale jade formation belt in southern China.

Shows how the color of Madagascar sapphire is lightened with heating to relatively low temperatures below 1350°C.