See Gem As
Tools
Research
CVD Diamonds with Invisible Markings
A new type of invisible marking in CVD diamonds suggests a possible security measure.
Musical Diamond
A dark crystal and a stress cleavage crack resemble a quarter note in a diamond.
“Snail” in Diamond
While different types of inclusions often occur independently within diamond, it is quite rare to find more than one occurring simultaneously, let alone in contact with each other.
10 ct HPHT-Treated CVD Laboratory-Grown Diamond
Testing a 10 ct CVD laboratory-grown diamond reveals evidence of HPHT treatment.
Eye Pattern in a Rock Fragment
A partially polished rock fragment exhibits a very realistic eye pattern.
Natural Diamond Mistaken as HPHT Synthetic
Declared synthetic diamond identified as natural in the Carlsbad lab.
An Irradiated CVD Synthetic Melee Diamond Found in Irradiated Natural Melee Diamonds
Single irradiated CVD synthetic was identified in a parcel of irradiated natural melee diamonds in the Tokyo lab.
Lizard Skin on Deformed Diamond
The surface texture of a diamond is affected by the gemstone’s structure.
Crowningshieldite: A New Mineral
A newly discovered mineral, crowningshieldite, was accepted on September 18, 2018, by the International Mineralogical Association.
The Foxfire Diamond, Revisited
The 187.63 ct rough diamond from Canada’s Diavik mine shows surprising reactions to ultraviolet light.
Silicon in Natural Type IIa and Type IaB Diamond
Silicon, normally associated with CVD synthetic diamond, may be found in natural diamond.
