Article Search Results

Show Filters
Showing 204 results for "*"
Suite containing over 36 carats of Yogo sapphire
Gemological Characterization of Sapphires from Yogo Gulch, Montana

A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.

Read More

Fancy Dark brown to Fancy black Marange diamonds
Black Diamonds from Marange (Zimbabwe): A Result of Natural Irradiation and Graphite Inclusions

Characterizes a suite of 40 natural brown to black diamonds from this deposit so that they can be distinguished from suspected treated black diamonds.

Read More

Burmese phenakite with perettiite-(Y) bundles (left) and tusionite inclusions (right).
Perettiite-(Y) and Tusionite Inclusions in Phenakite from Myanmar

Seldom-seen inclusions are found in a host material that is rare in its own right.

Read More

Six-rayed star in an untreated spinel.
Star Spinel with Four and Six Rays

A cabochon displaying asterism is found to be an untreated spinel with two different stars.

Read More

Mushroom in Mexican Copal
Mushroom in Copal

A Mexican copal plays host to a well-preserved mushroom.

Read More

Merelaniite whisker inclusions in tanzanite.
Merelaniite Inclusions in Tanzanite

A recently identified mineral is found, in whisker-like form, in a gem-quality tanzanite host.

Read More

Topaz from Pakistan with microlite inclusions.
Microlite Crystals in Topaz from Pakistan

Aesthetically pleasing inclusions are found in topaz from Pakistan’s Shigar Valley.

Read More

Raman analysis identified the horse-shaped inclusion as phlogopite mica.
A Horse-Shaped Inclusion in Pink Sapphire from Mozambique

Microscopic examination of a Mozambican pink sapphire reveals an inclusion with a surprising shape and composition.

Read More

Digital Photomicrography for Gemologists

A guide to capturing gem inclusion scenes using practical equipment and techniques and the appropriate image-refining software.

Read More

Russian demantoids with pure color and horsetail inclusions
Update on Russian Demantoid Production

Alexey Burlakov shares insights on the current production of Russian demantoid and emeralds.

Read More