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Sapphire

The name “sapphire” can also apply to any corundum that’s not ruby red, another corundum variety.

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Madagascar Beauty

This 7.04-ct. oval sapphire is from a new source, the island Madagascar.

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Blue Velvet

Deep, intense, velvety blue describes this sapphire’s color.

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Best in Daylight

Blue sapphire looks best in daylight and fluorescent light.

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Spindle Shape

This spindle-shaped crystal from Sri Lanka weighs 70.10-cts.

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Color Zoning

Blue color distribution in sapphire crystals is often uneven.

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Twinned

There is a second sapphire crystal growing into the larger one.

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Tools

Research

A group of rough sapphires encircle cut sapphires.
Article
Montana Yogo Sapphires’ Unique Gemology

A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.

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A pile of near-colorless HPHT synthetic melee
Article
Diamond Market Forecast: Declining Credit, Soft Prices and Lab-Grown Diamonds

Despite the generally strong year for jewelry retail, the diamond industry continues to face problems with credit, spotty demand and soft prices.

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The 14.06 ct blue Kashmir sapphire featuring pargasite inclusions
Large Pargasite Inclusion in Kashmir Sapphire

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

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Drill hole in heated pink sapphire
Drill Hole in Heated Pink Sapphire

An unexpected manmade feature is found in a pink sapphire from Myanmar.

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Dense cluster of zircon inclusions in Ethiopian sapphire
Zircon Cluster in Ethiopian Sapphire

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

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Birefringent crystals in a sapphire treated with heat and pressure
Microscopic Observations of Blue Sapphires Treated with Heat and Pressure

A previously unreported microscopic feature could be a useful indicator for corundum treated with heat and pressure.

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Shoppers walk in a mall past a Chow Tai Fook jewelry store.
Article
Season’s Sales: US Up 4% to 5%, But China Continues to Lag

The U.S. holiday season saw strong sales, but China continues to struggle. Plus: diamond market report and lab-grown diamond sales.

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A large pear shaped yellow diamond hangs from a black cord and lies against red material.
Article
US Holiday Season Opens Well, Despite Volatile Markets

The U.S. holiday shopping season is looking positive, despite signs that an economic slowdown may be coming in 2019. Plus, more auction sales records.

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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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