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The mystery of Minerals, brought to you by {name}

Antonio Rapisarda

L'ossidiana è un vetro vulcanico la cui formazione è dovuta al rapidissimo raffreddamento della lava, sempre ricca di ioni silicato. L'ossidiana è un vetro naturale, del tutto simile a quello di produzione umana.

Materia prima molto ricercata nell'antichità per la fabbricazione di strumenti taglienti (prevalentemente coltelli) è stata una delle merci che ha animato il commercio del Mediterraneo e sostenuto la vita economica dei luoghi di estrazione. Oggi viene ancora lavorata in piccoli oggetti decorativi, monili, lame per bisturi.

Splendida sfera di ossidiana, proveniente dal Messico.

Peso: 1060g
Diametro: 9,5cm

Mexico

Obsidian Sphere - Height: 9.5 11.14- 1060 g - (1)

Gemstones

Reserve price

No reserve price

Closing date

Friday

Saturday

tomorrow

Monday

Sunday

today

Budget

From

Location

Thailand

Germany

Italy

The Netherlands

Spain

France

India

Japan

Singapore

Belgium

Canary Islands

Luxembourg

Poland

Portugal

Object

Faceted gemstone

Country of origin

No origin given

Brazil

Stone

Sapphire

Emerald

Tanzanite

Spinel

Aquamarine

Ruby

Topaz

Opal

Tourmaline

Kunzite

Citrine

Fluorite

Amethyst

Garnet

Spodumene

Peridot

Tsavorite

Tourmaline paraiba

Alexandrite

Quartz

Zircon

Mixed gemstones

Fire Opal

Ametrine

Sapphire padparadscha

Certification

Antwerp Laboratory for Gemstone Testing (ALGT)

International Colored Gemstone Association (ICA GemLab)

Gem Report Antwerp (GRA)

International Gemological Institute (IGI)

Instituto Gemólogico Español (IGE)

Colour

Blue

Orange

Yellow

Brown

Pink

Bi-colour

Mixed cut

Oval

Pear

Modified brilliant cut

Cushion

Octagon

Step cut

Emerald cut

Faceted cut

Round

Heart

Triangle

Drop

Fancy

Modified cut

Briolette cut

Trilliant cut

Brilliant cut

Fantasy

Clarity

Loupe clean

Eye clean

Slight

Treatment

Commonly irradiated with no evidence of treatment

Commonly heated with no evidence of treatment

Not specified in the report

Heat treatment

Irradiation

No evidence of treatment

No heat treatment

Gemstone transparency

Transparent

Pearl luster

Excellent

Very good

Good

Optical effect (gemstones)

Fluorescence

No origin given - Heat treatment, Irradiation-  Lab report: TH25G116266

1 pcs  Blue Topaz  - 99.39 ct - International Colored Gemstone Association (ICA GemLab)

Commonly heated with no evidence of treatment, Commonly irradiated with no evidence of treatment-  Lab report: TH26G113723

1 pcs  Orange, Yellow Topaz  - 87.05 ct - International Colored Gemstone Association (ICA GemLab)

Not specified in the report-  Lab report: 28596105

No reserve price Topaz  - 81.05 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Intense/Vivid Blue Topaz

Commonly irradiated with no evidence of treatment, Commonly heated with no evidence of treatment-  Lab report: GRA-1830016 972AN

No reserve price Topaz  - 48.46 ct - Gem Report Antwerp (GRA) - Intense 'Swiss' Blue

Not specified in the report-  Lab report: 85289256

No reserve price Topaz  - 33.67 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Intense Blue Topaz

Heat treatment-  Lab report: TH26G116261

No reserve price - 1 pcs  Blue Topaz  - 33.21 ct - International Colored Gemstone Association (ICA GemLab) - AMAZING LUSTER BLUE TOPAZ

Commonly irradiated with no evidence of treatment, Commonly heated with no evidence of treatment-  Lab report: GRA-1830016 839AN

No reserve price Topaz  - 55.33 ct - Gem Report Antwerp (GRA) - Intense 'Swiss' Blue

Not specified in the report-  Lab report: 81650186

No reserve price Topaz  - 39.09 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Intense/Vivid Blue

Heat treatment-  Lab report: 773638346

No reserve price - 1 pcs  Blue Topaz  - 39.59 ct - International Gemological Institute (IGI)

Commonly irradiated with no evidence of treatment-  Lab report: 59524659

No reserve price Topaz  - 10.73 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - V. Light Brownish Yellow

Commonly irradiated with no evidence of treatment-  Lab report: D-64483

1 pcs  Blue Topaz  - 36.57 ct - Instituto Gemólogico Español (IGE)

Irradiation-  Lab report: D-65507

No reserve price - 2 pcs  Blue Topaz  - 12.07 ct - Instituto Gemólogico Español (IGE)

No origin given - Not specified in the report-  Lab report: TH26G116675

No reserve price - 1 pcs  Blue Topaz  - 35.98 ct - International Colored Gemstone Association (ICA GemLab)

Not specified in the report-  Lab report: 53881380

No reserve price Topaz  - 12.14 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Light Yellowish Brown

Commonly irradiated with no evidence of treatment, Commonly heated with no evidence of treatment-  Lab report: GRA-1830016 837AN

No reserve price Topaz  - 53.36 ct - Gem Report Antwerp (GRA) - Intense 'Swiss' Blue

Commonly irradiated with no evidence of treatment, Commonly heated with no evidence of treatment-  Lab report: GRA-1830016 965AN

No reserve price Topaz  - 44.51 ct - Gem Report Antwerp (GRA) - Intense 'Swiss' Blue

Commonly irradiated with no evidence of treatment-  Lab report: D-63341

Blue Topaz  - 25.70 ct - Instituto Gemólogico Español (IGE)

Commonly irradiated with no evidence of treatment-  Lab report: 78935314

1 pcs  Blue Topaz  - 40.13 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Swiss Blue

Heat treatment, Irradiation-  Lab report: 781617758

No reserve price Blue Topaz  - 30.08 ct - International Gemological Institute (IGI)

No evidence of treatment-  Lab report: D-60586

No reserve price Blue Topaz  - 29.60 ct - Instituto Gemólogico Español (IGE)

Commonly heated with no evidence of treatment, Commonly irradiated with no evidence of treatment-  Lab report: TH26G113743-6547

1 pcs  Blue Topaz  - 50.16 ct - International Colored Gemstone Association (ICA GemLab) - "London Topaz"

Commonly irradiated with no evidence of treatment-  Lab report: 71611482

1 pcs  Blue Topaz  - 38.12 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - London Blue

Not specified in the report-  Lab report: 60222708

No reserve price Topaz  - 12.36 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Sky Blue Topaz

Not specified in the report-  Lab report: 25800593

No reserve price Topaz  - 33.07 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Light Orangy Brown

Gemstones

This object is no longer available, but there’s still lots to explore

Obsidian Sphere - Height: 9.5 11.14- 1060 g - (1)

85 objects

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