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Certification: IGI (New York)
Certificate No: 577366282
Weight (ct): 5.09
Size (mm): 13.80 x 10.28 x 5.26
Shape: Oval
Clarity: Transparent
Color: Grey
Treatments: No indication of treatments
Origin: Mintabie, Australia

Large size dark crystal opal from a closed locality. This stone was bought directly from the miner, so the origin has been verified.

Origin is the opinion of the seller. All import and customs fees are the sole responsibility of the buyer.


Oval - IGI

Play of Colors Opal - 2.09 ct

Gemstones

Reserve price

No reserve price

Closing date

Sunday

Monday

tomorrow

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today

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21 August

22 August

23 August

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Object

Faceted gemstone

Gemstone cabochon

Ring

Country of origin

No origin given

Zambia

Tanzania

Myanmar/Burma

Sri Lanka

Mozambique

Brazil

Africa

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Unknown

Asia

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Stone

Sapphire

Emerald

Tanzanite

Spinel

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Topaz

Tourmaline

Ruby

Opal

Amethyst

Tsavorite

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Garnet

Tourmaline paraiba

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Alexandrite

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Ametrine

Sphalerite

Sapphire padparadscha

Certification

International Gemological Institute (IGI)

International Colored Gemstone Association (ICA GemLab)

Antwerp Laboratory for Gemstone Testing (ALGT)

Instituto Gemólogico Español (IGE)

Gem Report Antwerp (GRA)

Gemological Institute of America (GIA)

Lotus Gemology

Bellerophon Gemlab

Asian Institute of Gemological Sciences (AIGS)

Gem research Swiss Lab (GRS)

Guild Gem Laboratory

GEM-TECH Istituto Gemmologico

Istituto Gemmologico Italiano (IGI)

Gemewizard Gemological Laboratory (GWLab)

Anchor Cert

Colour

Blue

Green

Pink

Purple

Violet

Yellow

Orange

Multicolour

Brown

White

Grey

Bi-colour

Colourless

Black

Oval

Mixed cut

Cushion

Modified brilliant cut

Pear

Octagon

Step cut

Faceted cut

Emerald cut

Brilliant cut

Cabochon cut

Round

Modified cut

Heart

Rectangle

Square

Triangle

Fancy

Pear shape cut

Marquise

Cut cornered square

Drop

Mixed shape

Trilliant cut

Clarity

Eye clean

Moderate

Slight

Loupe clean

Heavy

Severe

Treatment

No evidence of treatment

No heat treatment

Heat treatment

Commonly heated with no evidence of treatment

Oiling

Not specified in the report

Clarity enhancement

Commonly irradiated with no evidence of treatment

Irradiation

Fracture healing / filling

Gemstone transparency

Transparent

Semi-transparent

Translucent

Semi-translucent

Opaque

Pearl luster

Excellent

Good

Very good

Optical effect (gemstones)

Colour change

Play of colour

Opalescence

Fluorescence

Asterism

Gemstones

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Play of Colors Opal - 2.09 ct

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