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Natural Opal, 4.11 ct, Well polished Australian Orange Opal, Great gem.

Specifications of This Gemstone:

Gemstone species: Genuine Natural Opal
Color: Orange
Shape/Cut: Oval Cabochon
Carat weight: 4.11 ct
Size: 11.1 X 11.9 X 6.1 mm
Treatment: Unheated
Clarity: Transparent
Luster: Great
Gem Hardness: 5.5 - 6.5
Country of origin: Australia
Number of pieces in the lot: 1

Common Terms Used and Meanings

IF	Nothing visible under a loupe (10X magnification)
VVS	Extra Fine Quality. These gems have microscopic inclusions which are difficult to slightly difficult to see under a loupe with 10x magnification.
VS	Very Fine Quality. Small pin-pricks are just visible to the scrutiny of the close naked eye. However, the beauty of the gem is not diminished in anyway.
SI1	Good Quality. These gems have inclusions which are fairly easy to see to the close naked eye. However, the overall beauty of the gem is still high.
SI2	Good to Medium-High Quality. These gems have inclusions, cracks or chips that are fairly easy to see with the close naked eye.
I	Medium to the lower qualities. Included gems with internal features that range from eye visible to very easily seen to the naked eye.
Opaque	No transmitted light through the gem.
Transparent	The gem transmits light.

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About Opal

Please Note:

The photos may be enlarged to show the detail. You may not see the details with naked eye. Often, the actual stone will look better than what you see on the picture because of the difficulty in reproducing the color exactly.

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