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23 February, 2023

Algt Colored Stone Identification Report # 17649965

Identification

Species .................................................................................... Natural Beryl
Variety ....................................................................................... Aquamarine

Description

Shape & Cutting Style ...................... Modified Octagon, Step Cut
Measurements ......................................... 14.23 X 14.23 X 10.43 Mm
Carat Weight ........................................................................... 13.15 Carat
Color ............................................................................................... Light Blue
Transparency ......................................................................... Transparent

Comments

Aquamarine Is Commonly Heated To Improve Its Color.
There Is Currently No Scientific Method Available To
Determine Whether This Gemstone Has Been Enhanced Or
Not.

Octagonal - ALGT (B)

Light Blue Aquamarine - 13.15 ct

Gemstones

Reserve price

No reserve price

Closing date

Saturday

Friday

Thursday

tomorrow

Sunday

Monday

Budget

From

Location

Thailand

The Netherlands

Spain

Germany

India

Italy

Portugal

Singapore

Israel

Belgium

France

United Kingdom

Poland

Sweden

Switzerland

United States

Bulgaria

Hong Kong

Austria

Greece

Slovak Republic

Cyprus

Canary Islands

Norway

Romania

Object

Faceted gemstone

Gemstone cabochon

Country of origin

No origin given

Zambia

Myanmar/Burma

Sri Lanka

Ethiopia

Colombia

Tanzania

Pakistan

Madagascar

Brazil

Africa

Mozambique

Türkiye

Nigeria

Afghanistan

Russia

Unknown

Bolivia

Namibia

Australia

Cambodia

Mali

Stone

Sapphire

Emerald

Spinel

Tanzanite

Opal

Ruby

Kunzite

Aquamarine

Amethyst

Topaz

Tourmaline

Peridot

Garnet

Tsavorite

Tourmaline paraiba

Fluorite

Sphalerite

Zircon

Sphene

Citrine

Alexandrite

Beryl

Rhodolite

Apatite

Diaspore

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

Gem research Swiss Lab (GRS)

Bellerophon Gemlab

Asian Institute of Gemological Sciences (AIGS)

Gübelin Gem Lab

GEM-TECH Istituto Gemmologico

Gemewizard Gemological Laboratory (GWLab)

CISGEM (Centro informazioni e servizi gemmologici)

Guild Gem Laboratory

The London Gem and Pearl Laboratory

Colour

Green

Blue

Yellow

Pink

Orange

Violet

Purple

Brown

White

Multicolour

Grey

Bi-colour

Colourless

Black

Mixed cut

Oval

Cushion

Pear

Octagon

Modified brilliant cut

Brilliant cut

Step cut

Emerald cut

Faceted cut

Round

Cabochon cut

Square

Rectangle

Heart

Modified cut

Triangle

Fancy

Marquise

Cut cornered square

Pear shape cut

Drop

Mixed shape

Squared emerald cut

Clarity

Eye clean

Slight

Loupe clean

Moderate

Heavy

Severe

Treatment

No evidence of treatment

No heat treatment

Oiling

Heat treatment

Commonly heated with no evidence of treatment

Not specified in the report

Clarity enhancement

Commonly irradiated with no evidence of treatment

Irradiation

Fracture healing / filling

Gemstone transparency

Transparent

Translucent

Semi-transparent

Semi-translucent

Opaque

Pearl luster

Excellent

Very good

Good

Fair

Optical effect (gemstones)

Colour change

Play of colour

Fluorescence

Opalescence

Iridescence

Tenebrescence

Adularescence

Gemstones

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Light Blue Aquamarine - 13.15 ct

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