
Colored Stones Cut with High Precision

Rock Buttons from the United States

Exotic Stingray Skin Jewelry
The Ferraccia Jewelry Collection exhibited a huge variety of stingray leather goods at the AGTA show, including bracelets, necklaces, earrings, rings, belts, purses, and mobile phone cases.

Zoned Scapolite from India

Buff-Top Round Diamond
The New York lab recently examined several diamonds with an interesting variation on the cabochon.

Diamond with Extremely Strong 578.9 nm Emission Center

Orange Diamond with Unusual Color Origin
GIA recently examined a rare orange diamond that demonstrated the complexity of diamond color origin.

Yellow Synthetic Sapphire Colored by Trapped-Hole Mechanism
A combination of trace-element analysis and UV-visible spectroscopy clearly indicated that the yellow color originated from the much more effective chromophore known as “trapped holes,” associated with the trace amount of Mg and Cr in this stone.

Large Oolitic Opal Block
The natural-color oolitic opal is the largest of its type examined by GIA.


A Remarkably Large Amblygonite-Montebrasite Carving

Irradiated and Annealed Blue Type Ia Diamond
Examination shows that a diamond was subjected to a multi-step process in order to introduce a blue color.

Color-Change Pink Pyrope Garnet Update
Greenland Ruby Update

Amber Filled with Epoxy Resin
Gulf countries experience an increase in epoxy resin filling in amber rosary beads.

Johnkoivulaite: A New Gem Mineral
A new mineral, johnkoivualite, named after prominent GIA gemologist and photomicrographer.

Emerald Update with Arthur Groom
Eternity Natural Emerald utilizes emerald sourced from Afghanistan to provide calibrated sets ranging from all quality levels and price points.

Imitation Opal with Interesting Play-of-Color Pattern
New imitation opal displays pronounced play-of-color phenomenon in a unique pattern covering large surface areas.

Faceted Chiolite
A very rare faceted “snow stone” was recently encountered in the Carlsbad laboratory.


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