Agate appears as an interesting inclusion in a pair of faceted quartzes.

The Tokyo laboratory reports on a bicolor copper-bearing tourmaline with bodycolor ranging from bluish green to dark yellowish green.

Unique dendritic inclusions containing penninite may be a key indicator of origin for Dahua nephrite.

A look at the latest cultured pearl trends and market updates from dealers at the AGTA show.

The increased popularity of “Edison” pearls was evident at the AGTA and GJX shows, with more colors and larger sizes available.

GIA’s Richard T. Liddicoat Gemological Library and Information Center wins award for exhibit highlighting mercury-free gold mining at TGMS.

Grossular-andradite garnet stands out at the Pueblo show with a beautiful vibrant green color and high-polish luster.

Orange-brown monazite inclusions in a purplish pink sapphire are analyzed for evidence of heat treatment.

A look at the Italian coral market and precious coral samples from the Mediterranean Sea.

Unusual diamonds with eye-visible inclusions are gaining popularity in the market.

Former university professor Sean Hill shares some of his unique jewelry designs at the GJX show.

A report on the striking color-change behavior of the first faceted synthetic wakefieldite seen at GIA.

The source of color in some diamonds, particularly fluorescent green and some yellow stones, can be very difficult to identify despite increasing knowledge about the radiation-related bands seen in the visible spectra of diamonds.

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

Synthetic nano-polycrystalline diamond is one of the latest and most exciting results of scientific efforts to synthesize a mineral that has held the fascination of humankind for ages.

Small cracks from laser engraving reveal the origin of these phantom quartz imitations.

A Montana sapphire of unusual size and color proves to be from the secondary deposit of Rock Creek.

Very similar inclusion scenes featuring needles and thin films make rubies from Kenya hard to distinguish from Mogok rubies.

A doubly terminated zircon inclusion survives multiple treatments in a translucent bangle of jadeite jade.