Al Gilbertson, May 5, 2016
Find out more about what causes a diamond to chip, and 8 tips on how you can avoid chipping your diamond.
Read MoreDeborah Dupont Martin, June 1, 1987
A treatise on the design, display, care and repair of fine gemstones.
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Learn about pearl's durability and how to care for your pearl jewellery.
Read MoreEmmanuel Fritsch and Elise B. Misiorowski, December 1, 1987
This article reviews the history of the conch "pearl," discusses S. gigas and its fisheries, and examines the gemmological properties and other characteristics of this attractive material.
Read MoreK. Nassau and A. E. Hanson, December 1, 1985
Several pearl-in-chicken cleaning experiments are carried out to test the validity of recipes from an ancient Egyptian source.
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