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The value of an opal have many factors, type of opal, body tone Black opal, dark opals, white opal, crystal opals, brilliance, opal gemstone pattern, opal colour bar thickness, the play of colour. Is the opal sold a doublet a triplet opal ect ? . Very good patterns include; Harlequin, Flagstone, Ribbon, Straw, Floral,Chinese Picture stones, resemble animal, object, landscape, person.Broad Flash,Pinfire,Rolling Flash. Faults Colours pattern when viewed from different directions also has an influence. Sand and various other minerals can be found as inclusions , a crack in the face can render almost worthless. Crazing many small cracks in the opal's face . Windows lacking in colour, faults lines, webbing, grey lines, black lines. Potch, brown on the surface of the opal gemstone will drop the value. Crystal opal refers to the transparency - opal - not its crystal structure - defined as any type of opal which is translucent to transparent. Brilliant play-of-colour range of the full spectrum of colours, the internal structure . Red fire opal is generally more valuable than a mainly green ect. Brilliance refers to the brightness and clarity of the colours af opal gemstones, ranges from brilliant , bright , dull. Taken into account when valuing the opal gemstone the thickness of the colour in opal, Queensland boulder opal typically has a very thin colour , overall size and shape of the opal gemstone stone. The cut & polish the size of the stone, being valued, opal is carefully examined and given a price 'per carat', overall carat size of the opal gemstone will then determine the price of the opal.
The value of an opal have many factors, type of opal, body tone Black opal, dark opals, white opal, crystal opals, brilliance, opal gemstone pattern, opal colour bar thickness, the play of colour. Is the opal sold a doublet a triplet opal ect ? . Very good patterns include; Harlequin, Flagstone, Ribbon, Straw, Floral,Chinese Picture stones, resemble animal, object, landscape, person.Broad Flash,Pinfire,Rolling Flash. Faults Colours pattern when viewed from different directions also has an influence. Sand and various other minerals can be found as inclusions , a crack in the face can render almost worthless. Crazing many small cracks in the opal's face . Windows lacking in colour, faults lines, webbing, grey lines, black lines. Potch, brown on the surface of the opal gemstone will drop the value. Crystal opal refers to the transparency - opal - not its crystal structure - defined as any type of opal which is translucent to transparent. Brilliant play-of-colour range of the full spectrum of colours, the internal structure . Red fire opal is generally more valuable than a mainly green ect. Brilliance refers to the brightness and clarity of the colours af opal gemstones, ranges from brilliant , bright , dull. Taken into account when valuing the opal gemstone the thickness of the colour in opal, Queensland boulder opal typically has a very thin colour , overall size and shape of the opal gemstone stone. The cut & polish the size of the stone, being valued, opal is carefully examined and given a price 'per carat', overall carat size of the opal gemstone will then determine the price of the opal.
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