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Smoky Quartz Gemstone Information
Information * Loose gemstones * Jewelry links

Smoky Quartz was often used for Victorian mourning jewelry. It is named cairngorm after the mountains in Scotland where it is found to be brown to black in color. The color comes from natural radiation exposure. Smoky quartz is also found in the Swiss Alps where different altitudes produce different colors and tones.

Click to view AGTA code.

Refractive Index 1.544-1.533
Hardness = 7 (Moh's Scale)
Specific Gravity =2.66
Species - Quartz
Optic Character - Double Refraction.

Ultrasonic: Usually safe
Steamer: Risky
Heat: Poor; color change may occur with heat; may fracture under abrupt temperature changes
Chemicals that harm: Hydrofluoric acid, ammonium fluoride.

Crystal Structure
Smoky Quartz crystal image.
Crystal system: Hexagonal (trigonal), compact.

Brazil, Madagascar, Sri Lanka, South Africa, Uruguay
 January  Garnet
February Amethyst
March Aquamarine
April Diamond
May Emerald
June Pearl/Alexandrite
July Ruby
August Peridot
September Sapphire
October Opal/Tourmaline
November Topaz or Citrine
December Blue Topaz or Zircon
Antique cut smoky quartz.
Antique Cushion smoky quartz.
Antique Cushion.

Straight baguette smoky quartz.
Straight Baguette.

Emerald cut smoky quartz.
Emerald cut.
Round brilliant cut smoky quartz.
Round cut.

Marquise cut smoky quartz.
Marquise cut.
Oval shape smoky quartz.
Oval shape.
Pear shape smoky quartz.
Pear Shape.
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