A unique parti-color Brazilian tourmaline necklace with a total weight of 961 carats. Photo by Duncan Pay/GIA, courtesy of Atlas Gemstones, Inc. At the AGTA ... lengths to show the typical concentric ...

In a previous color, we’ve talked about what makes things colored — the way objects absorb, reflect, or transmit light at ...

We’re all familiar with our birthstones, and the true jewelry enthusiasts among us can probably name a few other favorite ...

A handful of esteemed designers have recently been embracing jet, incorporating the featherlight gemstone into fine jewelry ...

The color of the best Maine tourmalines rival tourmaline from world-famous localities in California, Brazil, and the Himalayas. Individual crystals range from opaque to transparent and may be single ...

A closer look at precious stones, from rubies and spinels to diamonds, emeralds and more ...

192-carat cut Paraiba soon to set new Guinness World Record (2009) Jewellery News Asia, n. 303, p. 51. Arif, Mohammad; Henry, Darrell J.; Moon, Charlie J. (2010) Cr-bearing tourmaline associated with ...

To help in your studs search, I asked close to a dozen obsessives — including jewelry collectors ... cabochon turquoise, and watermelon tourmaline. Salter likes the slightly “medieval ...

Pink, green and blue tourmaline, aquamarine beryl and deep red garnet, purple amethyst and sparkling lepidolite — they all lie buried in Maine granite. To find them, all you have ...