Interiors & Decorations

Jewellery & Precious Stones

Watches, Pens & Lighters

Fashion

Coins & Stamps

Comics & Animation

Classic Cars, Motorcycles & Automobilia

Wine, Whisky & Spirits

Asian & Tribal Art

Trading Cards

Toys & Models

Archaeology & Natural History

Sports

Music, Movies & Cameras

Books & Historical Memorabilia

The millions of stories that Minerals convey, brought to you by {name}.

Georgia Foteinou

Please note that the photos were taken on both dry and wet opal. Obviously, the wet opal is brighter and more colorful, highlighting the effect that can be achieved after polishing. In Australian mining practice, rough opal is conventionally photographed wet, not to mislead buyers, but to represent the potential of the stone. For this reason, we encourage you to carefully evaluate the photographs before bidding. Thank you for your attention and happy bidding!

Natural Australian Rough Opal
Dimensions from 9 to 21 mm approx

Pictures taken with high resolution camera on different backgrounds in order to depict the opals as realistically as possible.

Worldwide shipping with registered mail and tracking number.



An opal is a hydrated form of silica with a water content ranging from 3 to 21%.Indeed, it is this permeability to water that makes it a hydrophile.
Opals are deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. Precious opals show a variable interplay of internal colors.

At microscopic scales, precious opal is composed of silica spheres some 150 to 300 nm in diameter in a hexagonal or cubic close-packed lattice. These ordered silica spheres produce the internal colors by causing the interference and diffraction of light passing through the microstructure of the opal.



Lightning Ridge, Australia

Cts. 63.80 Australian Rough Opal Rough- 12.76 g

Minerals & Meteorites

Reserve price

No reserve price

Buy now

Closing date

31 May

Sunday

30 May

tomorrow

Tuesday

29 May

Wednesday

Thursday

Monday

1 June

Budget

From

Location

Italy

Germany

The Netherlands

France

Spain

Lithuania

United Kingdom

Portugal

India

Poland

Ireland

Czech Republic

Türkiye

Latvia

Hong Kong

Belgium

Switzerland

Estonia

Austria

Singapore

Romania

United States

Greece

Taiwan

Canary Islands

Size

XS (under 10 cm)

S (10–40 cm)

M (40–80 cm)

L (over 80 cm)

Dimensions

Height

Width

Depth

Object

Raw mineral

Metaphysical stones

Carved mineral

Amber

Meteorite

Necklace

Bracelet

Mineral cabochon

Earrings

Ring

Nugget

2 piece jewellery set

Pendant

Necklace with pendant

Collar necklace

3 piece jewellery set

Carving

Drop earrings

Muonionalusta meteorite

Pallasite meteorite

Bangle

Chain

Lunar meteorite

Carved skull

Fossilised animal

Country of origin

Brazil

Madagascar

Afghanistan

Ethiopia

China

Pakistan

Australia

Morocco

Uruguay

Mexico

Tanzania

South Africa

Namibia

Myanmar

Indonesia

Russia

Peru

DR Congo

Material

Silver

Gold-plated

Agate

Lapis Lazuli

Metal

Bronze

Onyx

Gold leaf

Gold-filled

Steel

Ceramic

Yellow gold

Brass

Stone

Malachite

Gender

Women

Unisex

Condition

As new - unused

Natural

Excellent condition - barely used with minimal signs of wear

Enhanced

Good condition

Good condition - used with some signs of wear

Excellent condition

Very good condition - slightly used with small signs of wear

Hand carved

Restored

Good condition - used with small signs of aging & blemishes

Composed

Near mint

Vintage - used with visible signs of wear

Good condition - used with small signs of ageing

Manipulated

Cast

Good

Fair condition - used with visible signs of wear

As new, unused

Excellent condition: barely used with minimal signs of wear

Fair condition

Period

Paleogene, Eocene (56 - 33.9 million years)

Cretaceous, Lower (145 - 100.5 million years)

Neogene, Miocene (23.03 - 5.33 million years)

Paleogene, Oligocene (33.9 - 23.03 million years)

2020+

2026

Paleogene (66 - 23.03 million years)

Cretaceous (145 - 66 million years)

Independence (1947-present)

1970-1980

1990-2000

2000-2010

1960-1970

1980-1990

Jurassic, Upper (163.5 - 145 million years)

Devonian, Lower (419.2 - 393.3 million years)

Jurassic (201.3 - 145 million years)

Silurian (443.8 - 419.2 million years)

Ordovician (485.4 - 443.8 million years)

2010-2020

2020

2023

2025

1850-1900

Late 20th century

Coral

Pearl

Turquoise

Natural Pearl

Freshwater cultured pearl

Blood Coral

Opal

Aquamarine

Ruby

Lapis lazuli

Amethyst

Mixed gemstones

Topaz

Akoya cultured pearl

Tourmaline

Quartz

Minerals & Meteorites

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

Cts. 63.80 Australian Rough Opal Rough- 12.76 g

Popular in Minerals & Meteorites

7813 objects

Related collections