Large Faceted Hibonite
A hibonite of unusual size examined in the Carlsbad lab is host to a spinel inclusion.
Unusual Graining Structure in Pink Diamond
A Very Light pink diamond showing a uniform plane of color intersecting with a cone of strain that fit perfectly into a colorless hole is studied at the Carlsbad lab.
Orange Faceted Eosphorite
The first faceted eosphorite, a member of the childrenite-eosphorite series, is seen in the Carlsbad lab.
Assembled Cultured Blister Pearl with an Unusual Component
An assembled mabe pearl contains a fluted object, the function of which is unknown.
Dyed and Natural Green Jadeite
Spectroscopy and microscopic observation reveal that areas of a natural green jadeite carving have been dyed.
Yellow HPHT-Processed Rough Diamond
HPHT annealing of a nearly eye-clean yellow natural rough diamond is revealed through spectroscopic analysis.
Irradiated Green-Blue CVD Synthetic Diamonds
Advancing CVD growth technologies yield intensely colored, high-quality synthetic diamonds, such as the two green-blue synthetic materials seen in the New York lab.
Polished Freeform Topaz Imitating Diamond Rough
Material submitted as a rough diamond is revealed through gemological testing and analysis to be a near-colorless topaz.
Coated Kornerupine Beads
Beads with an unusual metallic luster are found to be kornerupine with a coating possibly made with copper.
Three Unique Large Natural Pearls from Haliotis (Abalone) Species
Abalone pearls submitted to the New York lab provide insight into the range of colors and shapes this type of mollusk can produce.