Article Search Results

Show Filters
Showing 48 results for "*"
The Eyepiece Pointer: A Useful Microscope Accessory

The eyepiece pointer simplifies the task of pointing out microscopic features on or in any gemstone.

Read More

The First-Order Red Compensator: An Effective Gemological Tool

The many gemological applications of the first-order red compensator.

Read More

Pitfalls in Color Grading Diamonds by Machine

Two major sources of error make spectroscopically determined color grades unreliable.

Read More

Engraved Gems: A Historical Perspective

The history of engraved gems and a look at the engraving process itself.

Read More

The GEM DiamondMaster and the Thermal Properties of Gems

Thermal properties and the potential applications of the GEM DiamondMaster in testing them.

Read More

Artistry in Rock Crystal: The Van Pelt Collection

The lapidary arts of Harold and Erica Van Pelt.

Read More

Carving Gem-Quality Opal

An examination of the challenges of carving gem-quality opal.

Read More

Pinpoint Illumination: A Controllable System of Lighting for Gem Microscopy

A review of a very useful hand-held tool for jewelers and gemologists.

Read More

Two Notable Color-Change Garnets

The gemological properties and chemical compositions of two unusual color-change garnets are reviewed.

Read More

The Cutting Properties of Kunzite

The cutting of a one-kilo kunzite crystal demonstrates the problems inherent in working with this stone.

Read More