• Hardness

  5.5 - 6.5.

• Occurrence

  Australia, former Czechoslovakia, U.S., Brazil, Mexico and southern Africa. Opal and tourmaline are the birthstones of the month of October.

• Appearance

  Opal doublets and triplets are thin slices of opal which are bonded to a matrix and sometimes covered with a quartz top (triplets).

• Enhancements

  Opal is rarely impregnated with colorless oil, wax and resins. Triplets are covered with colorless quartz.

  More information on gemstone enhancements.

• Opal Doublet

  • Item #OPL598
    	1.88 ct.
    	14.5x5.6mm Cabochon, Irregular Cut
    	Medium
    	Vivid Blue
    	Opaque
    	[A] Not normally enhanced.
    	one of a kind
    With lighter blue fire.
    Opal Doublet Opal	$ 34.99

  • Item #OPL566
    	0.78 ct.
    	7.3x5.6mm Irregular Shape
    	Medium
    	Slightly Grayish Bluish Violet
    	Opaque
    	[N] Not enhanced.
    	one of a kind
    With red and blue fire
    Opal Doublet Opal	$ 14.99

  • Item #OPL567
    	1.08 ct.
    	9.4x5.8mm Irregular Shape
    	Medium
    	Slightly Grayish Greenish Blue
    	Opaque
    	[N] Not enhanced.
    	one of a kind
    With red and blue fire
    Opal Doublet Opal	$ 19.99

  • Item #OPL570
    	1.30 ct.
    	8.8x6.4mm Irregular Shape
    	Medium
    	Strong Blue Green
    	Opaque
    	[N] Not enhanced.
    	one of a kind
    With blue and green fire
    Opal Doublet Opal	$ 19.99

  • Item #OPL572
    	1.12 ct.
    	9.1x7.0mm Irregular Shape
    	Medium
    	Strong Blue
    	Opaque
    	[N] Not enhanced.
    	one of a kind
    With areas of darker blue
    Opal Doublet Opal	$ 19.99

  • Item #OPL576
    	1.71 ct.
    	9.5x8.5mm Irregular Shape
    	Medium
    	Strong Blue
    	Opaque
    	[N] Not enhanced.
    	one of a kind
    With areas of white and darker blue and green fire
    Opal Doublet Opal	$ 24.99

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Last updated April 30, 2008
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