Research & News
Condor Agate from Argentina
A vibrant orange and yellow agate displays interesting concretions in its core.
Colombian Emeralds and Mozambican Rubies
An update on activity at the Coscuez emerald source, as well as ruby deposits in Mozambique.
Trapiche-Like Ruby from the Batakundi Mine, Kashmir
Trapiche-like ruby from Kashmir shows a well-formed fixed six-rayed pattern.
Diamonds: An Early History of the King of Gems
A review of Diamonds: An Early History of the King of Gems by Jack Ogden.
Color-Change Pink Pyrope Garnet Update
Pyrope garnets showing an amazing color change, first seen at Tucson in 2015, are on display in 2019.
Faint Green HPHT Synthetic Diamonds
Faint green HPHT synthetic diamonds recently submitted to the Carlsbad lab owe their color to high concentrations of nickel.