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Gemstone: Natural Amethyst certified by ALGT  : 62787837
Weight: 37.29 ct.
Shape: Oval  (excellent cut)
Clarity: Transparent
Size: 24.15  x 17.82 x  14.17 mm
Colour:   Purple 
Lustre: Superior
Treatment: No indication of treatments
*Origin: The stone comes from Brazil even though it is not specified on the certificate.

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Oval - ALGT (B)

Purple Amethyst - 37.29 ct

Gemstones

Reserve price

No reserve price

Closing date

tomorrow

Wednesday

Thursday

today

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Saturday

9 March

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Thailand

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Object

Faceted gemstone

Gemstone cabochon

Country of origin

No origin given

Zambia

Sri Lanka

Tanzania

Ethiopia

Myanmar/Burma

Colombia

Brazil

Madagascar

Africa

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Unknown

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Stone

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Emerald

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Certification

International Gemological Institute (IGI)

International Colored Gemstone Association (ICA GemLab)

Antwerp Laboratory for Gemstone Testing (ALGT)

Instituto Gemólogico Español (IGE)

Gemological Institute of America (GIA)

Gem Report Antwerp (GRA)

Gem research Swiss Lab (GRS)

Bellerophon Gemlab

Lotus Gemology

Asian Institute of Gemological Sciences (AIGS)

Guild Gem Laboratory

Gemewizard Gemological Laboratory (GWLab)

Gübelin Gem Lab

Istituto Gemmologico Italiano (IGI)

Deutsche Stiftung Edelsteinforschung (DSEF)

Colour

Green

Blue

Violet

Pink

Yellow

Purple

Orange

White

Brown

Multicolour

Bi-colour

Grey

Colourless

Oval

Mixed cut

Cushion

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Clarity

Eye clean

Slight

Moderate

Loupe clean

Heavy

Severe

Treatment

No evidence of treatment

No heat treatment

Oiling

Commonly heated with no evidence of treatment

Heat treatment

Not specified in the report

Clarity enhancement

Commonly irradiated with no evidence of treatment

Irradiation

Impregnation

Gemstone transparency

Transparent

Translucent

Semi-transparent

Semi-translucent

Opaque

Pearl luster

Excellent

Very good

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Fair

Optical effect (gemstones)

Colour change

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Fluorescence

Tenebrescence

Iridescence

Asterism

Adularescence

Gemstones

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Purple Amethyst - 37.29 ct

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