New Record Size for CVD Laboratory-Grown Diamond
The New York laboratory reports on a new record size for CVD laboratory-grown diamond.
Large Green and Yellow Diamonds Colored by Nickel Impurities
Testing several large green and yellow diamond samples reveals that nickel-colored diamonds can occur in larger sizes and stronger color saturations than previously suspected.
Dyed Fluorite
Testing two samples of green rough submitted for emerald identification reveals dye concentrations along fractures.
HPHT-Processed Natural Type Ia Diamond
New York laboratory receives resubmission of HPHT-treated diamond that changed from a dark yellowish brown to a deep yellow-orange during treatment.
Repaired Grandidierite
The Carlsbad laboratory receives first submission of repaired grandidierite.
Hydrothermal Synthetic Ruby
A transparent cushion-cut hydrothermal synthetic ruby was recently submitted to Carlsbad laboratory for an identification report.
Nail-Head Spicule in a Russian Emerald
The Carlsbad laboratory observes a nail-head spicule in a natural Russian emerald.
Unusual Laser Drill Holes in a Laboratory-Grown Diamond
Unusual laser drill holes identified in a laboratory-grown Fancy yellow cushion modified brilliant diamond.