Program aims to educate young consumers about mined stones’ positive qualities.
1.10-carat, fancy-colored stone underwent HPHT treatment to achieve the desired hue, according to the institute.
What generated the greatest interest? The good, the bad and the synthetics.
Terms that appeared most often in Rapaport’s newsfeed included “tariffs” and “De Beers.”
Process, developed in 1990s to improve color, is in common use on inexpensive, widely available gemstones.
The 2.50-carat stone’s phosphorescence levels are more common in lab-grown, institute says.
Lab to show source countries for peridot, opal, jade and demantoid garnet.
Testing rules out several likely causes for unusual cloud patterns, prompting need for further investigation.
GIA’s Dr. Evan Smith discusses some of the earth’s most remarkable treasures.
She will retire as president and CEO at the end of the year.
Stone is from Karowe mine in Botswana.