Summer 2007 G&G Lab Notes
HPHT-Treated Type Ia Diamond with a Green Component Caused by the H2 Defect
Diamond with Intense “Rainbow Graining”
Natural Color Hydrogen-Rich Blue-Gray Diamond
Type IIa Diamond with Intense Green Color Introduced by Ni-Related Defects
Diamond with Zigzag Cleavage
HPHT-Grown Synthetic Diamond Crystal with Unusual Morphology and Negative Trigons
Idocrase in Jadeite: A Heavenly Home
Opal with Unusual Structure
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