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The allure of gemstones, brought to you by {name}

Purificacion Aquino Garcia

13 March, 2023

Algt Colored Stone Identification Report # 37831203

Identification

Species ................................................................................ Natural Zoisite
Variety ............................................................................................ Tanzanite

Description

Shape & Cutting Style ............................................... Pear, Mixed Cut
Measurements .............................................. 11.01 X 7.96 X 5.76 Mm
Carat Weight ............................................................................. 3.19 Carat
Color ........................................................................... Intense Purple-blue
Transparency ......................................................................... Transparent

Additional Grading Characteristics

Suggested Origin ....................................................................... Tanzania

Comments

Tanzanite Is Commonly Heated At Low Temperature To Improve Its Color. 

There Is Currently No Scientific Method Available To Determine Whether This Gemstone Has Been Enhanced Or Not.

Tanzania - Pear - ALGT (B)

Intense Purple-Blue Tanzanite - 3.19 ct

Gemstones

Reserve price

No reserve price

Closing date

Sunday

Saturday

tomorrow

today

Monday

Tuesday

Wednesday

Budget

From

Location

Thailand

India

Spain

The Netherlands

Germany

Italy

Portugal

Singapore

Israel

Belgium

United Kingdom

France

Poland

Austria

Sweden

Switzerland

Cyprus

Bulgaria

Hong Kong

Greece

Slovak Republic

United States

Czech Republic

Canary Islands

Romania

Object

Faceted gemstone

Gemstone cabochon

Country of origin

No origin given

Zambia

Sri Lanka

Ethiopia

Tanzania

Pakistan

Colombia

Madagascar

Brazil

Mozambique

Myanmar/Burma

Nigeria

Africa

Unknown

Afghanistan

Türkiye

Russia

Vietnam

Mexico

Bolivia

Namibia

Stone

Sapphire

Emerald

Tanzanite

Spinel

Aquamarine

Opal

Amethyst

Tourmaline

Ruby

Topaz

Peridot

Kunzite

Garnet

Tsavorite

Citrine

Alexandrite

Fluorite

Tourmaline paraiba

Sphalerite

Ametrine

Spessartite

Fire Opal

Spodumene

Sapphire padparadscha

Rhodolite

Certification

International Gemological Institute (IGI)

Antwerp Laboratory for Gemstone Testing (ALGT)

International Colored Gemstone Association (ICA GemLab)

Instituto Gemólogico Español (IGE)

Gemological Institute of America (GIA)

Gem Report Antwerp (GRA)

Bellerophon Gemlab

Lotus Gemology

Asian Institute of Gemological Sciences (AIGS)

Gem research Swiss Lab (GRS)

Guild Gem Laboratory

Istituto Gemmologico Italiano (IGI)

GEM-TECH Istituto Gemmologico

Gübelin Gem Lab

No laboratory report

Colour

Green

Blue

Yellow

Purple

Pink

Violet

Orange

Brown

White

Multicolour

Grey

Bi-colour

Colourless

Black

Mixed cut

Oval

Cushion

Pear

Octagon

Emerald cut

Modified brilliant cut

Faceted cut

Step cut

Brilliant cut

Round

Cabochon cut

Heart

Modified cut

Rectangle

Triangle

Square

Pear shape cut

Drop

Fancy

Cut cornered square

Marquise

Radiant

Mixed shape

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

Fracture healing / filling

Irradiation

Gemstone transparency

Transparent

Semi-transparent

Translucent

Semi-translucent

Opaque

Pearl luster

Excellent

Very good

Good

Fair

Optical effect (gemstones)

Colour change

Play of colour

Fluorescence

Opalescence

Tenebrescence

Asterism

Gemstones

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Intense Purple-Blue Tanzanite - 3.19 ct

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