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Fancy Color Diamond

Dazzling brilliance. Captivating color. The planet’s most valued gems are fancy color diamonds.

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Radiant Cut

The radiant cutting style helps intensify a fancy colored diamond’s color.

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Beyond Z

Diamonds with more yellow than GIA’s Z grade are considered fancy color.

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Color is Value

Subtle color differences impact the value of a fancy colored diamond.

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Octahedral Form

Beautifully formed octahedrons might become collectors' treasures.

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Crystal Faces

Diamond crystal faces show cutters how to get the best weight retention.

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Uneven Color

The color in rough diamond might not be evenly distributed in the rough.

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Tools

Research

A large piece of rough, left, with a portion cut out of it, and six cut and polished diamonds produced from the cut out piece of rough.
Article
Chipping Away at 1,109 ct Lesedi La Rona

Graff reveals the first polished diamonds produced from the Lesedi La Rona, one of the largest pieces of rough ever mined. Plus, other market news.

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Three loops of diamond ribbons form a bow around a ruby framed by more diamonds.
Article
National Retail Federation Predicts a Cheery Holiday

The building blocks are in place for a strong 2018 U.S. holiday season. Plus, diamond market updates and upcoming auctions.

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Crowds of people on the trade show floor.
Article
Typhoon, Trade Wars and Currency Lows Dampen Hong Kong Shows

Business at the September Hong Kong Gem and Jewellery Shows was spotty, despite a strong world economy. Buyers left early to avoid Typhoon Mangkhut.

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Parallel bands of green color at room temperature.
Uncommon Parallel Color Zoning in a Chameleon Diamond

A diamond examined in the Carlsbad lab shows chameleon coloring in an unusual pattern.

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A pile of rough diamonds of various colors.
Article
Robust Demand Brings Increased Rough Diamond Sales

Demand for diamonds has been good so far this year. Rough sales have increased and large diamonds are being mined. Plus: Online sales tax changes.

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A large blue pear shaped diamond hangs from a colorless and pink diamond.
Article
Rockefeller and Fancy Blues Highlight Spring 2018 Auctions

Rockefeller jewels and fancy blue diamonds are the stars of the spring 2018 auction season.

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Show attendees at registration booths.
Article
JCK Las Vegas 2018: Demand Improves, But Attendance Declines

Jewelry designers, manufacturers and diamond dealers generally saw steady, if still somewhat cautious, business.

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A large piece of rough diamond sits on some rocks.
Article
2018: A Good Year for Finding Mega-Diamonds

The three diamond mining companies that specialize in digging up large stones have found some really big ones during the first quarter of the year.

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This fancy deep green-blue diamond was treated in a multi-step process.
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.

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Article
2017 Auction Roundup: Pink and Blue Fancy Colored Diamonds Still Rule

Buyers may have been discerning, but more than $1.1 billion worth of extreme top-end diamonds, colored gems and jewelry were sold at auction in 2017.

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