CLAM SHELL OPALIZED

COOBER PEDY, AUSTRALIA

NATURAL SHELL IN HOST ROCK

Bi-Valve

OPALIZED FOSSIL

Opalised clam shells on a shell patch refer to fossilized clam shells that have undergone opalization, typically found in a concentrated area (a "shell patch") within sedimentary rock layers.

precious opal replaces the original organic shell material over millions of years.

• Coober Pedy – The Source

  Located in South Australia, Coober Pedy is one of the most famous opal mining regions in the world.

  Around 100 million years ago, the area was covered by an inland sea, perfect conditions for marine fossils like clams, belemnites, and even dinosaur bones.

  Today, it’s known for producing precious opals and opalised fossils—some of which are museum-grade or even scientifically significant

  Fossilised shells (from ancient marine clams) that have been replaced or filled with precious opal over millions of years.

  This opalisation process occurs when silica-rich water seeps into the fossil cavities and solidifies over time.

  The result is a fossil with brilliant opal colouration, often with play-of-colour in blues, greens, reds, or purples.

• A shell patch a dense concentration of fossil shells, often formed where ancient rivers, lakes, or seas once existed.

TRADING AS - TRUEBLUEOPALS PTY LTD / LIGHTNINGOPALS LLC

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