Aura Opal Core Coober Pedy Australia Genuine Opal Mineral Specimen Display Piece Natural Australian Precious Opal with COA

Aura Opal Core – Coober Pedy, South Australia

This stunning Aura Opal Core mineral specimen from the world-famous opal fields of Coober Pedy, South Australia, is a genuine and carefully chosen collector’s piece. The photographs show the exact specimen you will receive, ensuring complete confidence when purchasing.

This natural opal specimen includes a Certificate of Authenticity lifetime guarantee generic card, confirming it as a real geological mineral example. Full sizing and scale details can be seen clearly in the listing photographs.

Coober Pedy is internationally recognised as the “Opal Capital of the World,” producing some of the most iconic Australian precious opal specimens ever discovered.

Mineral Type & Scientific Classification

Opal is a hydrated amorphous form of silica, with the chemical composition SiO₂·nH₂O. Unlike many crystalline minerals, opal does not form in a true crystal system. Instead, it develops as a mineraloid, often filling cavities and fractures within sedimentary host rocks.

What makes opal so prized is its unique internal structure. Precious opal contains microscopic silica spheres arranged in patterns that can produce an optical phenomenon known as play-of-colour. This natural diffraction effect creates shifting flashes of colour when viewed from different angles.

Opal specimens may range from milky white to cream, grey, honey tones, or vibrant colour-bearing material depending on formation conditions and trace inclusions.

Geological Formation – Coober Pedy Opal Fields

The Coober Pedy opal deposits formed during the Cretaceous period, around 100 million years ago, within ancient marine sediments. Over time, silica-rich groundwater moved through porous rock layers, depositing silica gel into voids, cracks, and fossil cavities.

As this silica gel slowly hardened, it formed opal seams, nodules, and cores. Coober Pedy opal is often found in ironstone or sandstone matrix, making each specimen geologically distinctive and tied directly to Australia’s famous outback mining heritage.

This Aura Opal Core represents a natural piece of that remarkable geological history.

Appearance & Display Qualities

Aura opal core specimens are valued for their natural textures, colour potential, and striking mineral presence. Opal can show:

• Subtle translucency to opaque body tones

• Natural surface patterns and matrix contrast

• Possible flashes of colour depending on internal structure

• A smooth to waxy lustre typical of opal material

Each opal core is completely unique, shaped by natural deposition and the surrounding host rock environment.

This specimen is ideal for display in a mineral cabinet, as a conversation piece, or as part of an Australian gemstone collection.

Collecting, Gifting & Educational Value

Australian opal remains one of the most collected and admired gemstone minerals in the world. This Coober Pedy specimen is perfect for:

• Opal and gemstone collectors

• Australian locality mineral enthusiasts

• Geological study of silica mineraloids

• Unique natural history gifts

• Decorative display with authentic outback provenance

Opal is also traditionally associated with spiritual symbolism and inspiration in various cultures, though it is best appreciated first and foremost as a remarkable natural mineral treasure.

Authenticity & Purchase Confidence

• Genuine Aura Opal Core mineral specimen

• Locality: Coober Pedy, South Australia

• Natural, untreated geological example

• Includes Certificate of Authenticity lifetime guarantee generic card

• Photos show the exact piece you will receive

• Full sizing available in listing images

A beautiful and collectible Australian opal specimen, combining world-renowned origin, fascinating geological formation, and timeless display appeal.