Lightbox, a De Beers company, has begun selling “white,” pink, and blue CVD laboratory-grown diamonds at a flat rate of $800 per carat.

Unusually large prismatic pargasite inclusions observed in a Kashmir sapphire submitted to the Carlsbad lab for origin determination.

An exceptional ruby specimen is identified with a Montana origin in the Carlsbad lab.

In the early 1960s, French ceramist and engineer Pierre Gilson succeeded in growing and producing flux synthetic emerald of commercially marketable quality.

Garnets have been known since antiquity. However, it was only during the late nineteenth century that the green variety demantoid—named for its “diamond-like” luster—was discovered in the Ural Mountains of Russia.

Reveals an uncommon fluid inclusion in fluorite.

The presence of these zircon clusters might help separate Ethiopian sapphire from other basalt-related sources.

Summarizes data collected by GIA on more than 90,000 natural diamonds in this color range and presents their gemological and spectroscopic properties.

In recent months, sapphires treated under heat and pressure have been documented in the trade.

Examination of a type IaB diamond that exhibited instantaneous 2803 cm^–1 FTIR absorption shortly after exposure to an ultra-short-wave UV source.

Single HPHT laboratory-grown diamond identified in a ring containing 194 natural diamonds.

A rough sample submitted as diamond is proven to be a synthetic moissanite with a thin diamond coating.

Held October 21 and 22 at Cinema Row, the Chicago Responsible Jewelry Conference drew 200 attendees who heard industry experts discuss safe, sustainable, ethical gem production and jewelry design.

A pink synthetic moissanite is coated with a thin colored film, raising questions about the natural origin of its color.

A rock crystal quartz displayed a large, well-formed rutile crystal inclusion under the table.

Important topics such as sustainability, blockchain, nanotechnology, and traceability were discussed at the second World Emerald Symposium held in Bogotá.

“Blue flashes” seen with the DiamondView help to analyze the quantity and variety of emerald-filling substances.

Presenters reported on a broad range of research topics at the annual meeting of the Geological Society of America in Indianapolis.

Black diamonds are striking in jewelry. GIA researchers report on the unique properties used to identify black diamonds and the potential treatments.

Smit K.V., Shirey S.B., Hauri E.H., Stern R.A. (2019) Sulfur isotopes in diamonds reveal differences in continental construction. Science, Vol. 364, No. 6438, pp. 383-385.