Stromatolite Specimen | Polished Striated Mineral Specimen
Stromatolites are among the earliest evidence of life on Earth, layered structures built over millennia by microscopic cyanobacteria that trapped and bound sediment mat by mat. Western Australia holds some of the finest in the world, from the ancient fossil stromatolites of the Pilbara, dated to around 3.5 billion years, to the living examples at Shark Bay.
This polished slice reveals those growth layers in fine detail: wavy, concentric bands in warm earth tones, brought to a smooth finish that catches the light while the reverse keeps its natural form.
A stromatolite specimen is a profound addition to any collection. Not just a beautiful stone, they are a record of life and a perfect gift for mineral and fossil collectors, admirers of our minerals gallery, and anyone seeking an authentic, out-of-the-ordinary décor piece or gift.
This stromatolite specimen has been ethically and sustainably sourced, reflecting the Australian Museum's respect for the natural world and care for Country.
Dimensions: 105 x 65 x 55 mm and weighs 390 grams
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Frequently Asked Questions
A stromatolite is a layered mound built by communities of microbes, mainly cyanobacteria. The microbes form a sticky mat that traps fine sediment and precipitates minerals; the mat then grows over the top, and repeating this over centuries stacks up the characteristic banded layers. Individual microbes almost never fossilise, but the structures they build are durable and survive in the rock record, which is why they give us physical evidence of early life where the organisms themselves left none.
What is special about Western Australia for Stromatolites?
The oldest widely accepted examples are around 3.5 billion years old, from the Pilbara in Western Australia (the Dresser and Strelley Pool formations). That places them among the earliest direct traces of life on the planet.
What is the importance of cyanobacteria?
Cyanobacteria mattered enormously later: their photosynthesis released oxygen that, over hundreds of millions of years, transformed Earth's atmosphere.
