• Hardness

  6.5 - 7.0.

• Occurrence

  Worldwide. A member of the chalcedony family (micro-crystalline quartz).

• Appearance

  Bands of sard (brownish red) and onyx (white), occasionally with agate (translucent). Peridot and sardonyx are the birthstones of the month of August.

• Enhancements

  Sardonyx is usually dyed.

  More information on gemstone enhancements.

• Sardonyx

  • Item #SDX151
    	3.35 ct.
    	10.0mm Cabochon, Round Cut
    	Medium Dark
    	Moderately Strong Red
    	Translucent
    	[N] Not enhanced.
    	Quantity Available: 6
    with bands of white and yellow sard, and topped with clear agate.
    Sardonyx Chalcedony	$ 11.99

  • Item #SDX214
    	5.12 ct.
    	12.0mm Cabochon, Round Cut
    	Medium Dark
    	Very Slightly Brownish Red
    	Slightly Translucent
    	[N] Not enhanced.
    	Quantity Available: 17
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 12.99

  • Item #SDX112
    	7.37 ct. total
    	12.0x10.0mm Cabochon, Oval Cut
    	Medium Dark
    	Moderately Strong Red
    	Translucent
    	[N] Not enhanced.
    	Quantity Available: 5 pairs
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 24.99/pair

  • Item #SDX113
    	10.55 ct.
    	18.0x13.0mm Cabochon, Oval Cut
    	Medium Dark
    	Moderately Strong Red
    	Translucent
    	[N] Not enhanced.
    	Quantity Available: 14
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 14.99

  • Item #SDX126
    	4.48 ct. total
    	10.0x8.0mm Cabochon, Oval Cut
    	Medium Dark
    	Moderately Strong Red
    	Translucent
    	[N] Not enhanced.
    	Quantity Available: 16 pairs
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 14.99/pair

  • Item #SDX133
    	9.48 ct. total
    	14.0x10.0mm Cabochon, Oval Cut
    	Medium Dark
    	Moderately Strong Red
    	Translucent
    	[N] Not enhanced.
    	Quantity Available: 8 pairs
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 14.99/pair

  • Item #SDX215
    	20.92 ct.
    	25.0x18.0mm Cabochon, Oval Cut
    	Medium Dark
    	Very Slightly Brownish Red
    	Slightly Translucent
    	[N] Not enhanced.
    	one of a kind
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 18.99

  • Item #SDX216
    	19.99 ct.
    	25.0x18.0mm Cabochon, Oval Cut
    	Medium Dark
    	Very Slightly Brownish Red
    	Slightly Translucent
    	[N] Not enhanced.
    	one of a kind
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 18.99

  • Item #SDX217
    	21.48 ct.
    	25.0x18.0mm Cabochon, Oval Cut
    	Medium Dark
    	Very Slightly Brownish Red
    	Slightly Translucent
    	[N] Not enhanced.
    	one of a kind
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 18.99

  • Item #SDX218
    	21.69 ct.
    	25.0x18.0mm Cabochon, Oval Cut
    	Medium Dark
    	Very Slightly Brownish Red
    	Translucent
    	[N] Not enhanced.
    	one of a kind
    Sard, with bands of yellow.
    Sardonyx Chalcedony	$ 18.88

  • Item #SDX219
    	70.99 ct.
    	40.0x30.1mm Cabochon, Oval Cut
    	Medium Dark
    	Very Slightly Brownish Red
    	Translucent
    	[N] Not enhanced.
    	one of a kind
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 24.99

  • Item #SDX220
    	71.14 ct.
    	40.2x30.2mm Cabochon, Oval Cut
    	Medium Dark
    	Very Slightly Brownish Red
    	Translucent
    	[N] Not enhanced.
    	one of a kind
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 24.99

  • Item #SDX221
    	72.15 ct.
    	40.2x30.2mm Cabochon, Oval Cut
    	Medium Dark
    	Slightly Brownish Red
    	Translucent
    	[N] Not enhanced.
    	one of a kind
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 24.99

  • Item #SDX222
    	68.71 ct.
    	40.1x30.0mm Cabochon, Oval Cut
    	Medium Dark
    	Slightly Brownish Red
    	Translucent
    	[N] Not enhanced.
    	one of a kind
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 24.99

  • Item #SDX223
    	71.21 ct.
    	40.1x30.3mm Cabochon, Oval Cut
    	Medium Dark
    	Very Slightly Brownish Red
    	Translucent
    	[N] Not enhanced.
    	one of a kind
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 24.99

  • Item #SDX224
    	69.00 ct.
    	40.0x29.9mm Cabochon, Oval Cut
    	Medium Dark
    	Very Slightly Brownish Red
    	Translucent
    	[N] Not enhanced.
    	one of a kind
    Sard, with bands of white onyx.
    Sardonyx Chalcedony	$ 24.99

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Last updated June 10, 2010
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