{"product_id":"moroccan-sand-stromatolite-pseudo-stromatolite-desert-concretion-80g-2","title":"Moroccan Sand Stromatolite Pseudo-Stromatolite Desert Concretion 80g #2","description":"\u003cp\u003eA fascinating natural Moroccan pseudo-stromatolite sand concretion, weighing approximately 316g.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eOften known and sold within the mineral trade as a “sand stromatolite” or “desert onion”, these unusual formations are more accurately classified as natural sand concretions rather than true fossil stromatolites.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThis substantial specimen has a wonderfully sculptural form, with several joined rounded formations displaying striking concentric ring and onion-like patterns across the main face. Smaller circular structures appear between the larger formations, making this an especially interesting multi-node example.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe warm reddish-orange and sandy brown colouring comes from the mineral-rich sediment, while the naturally rough, granular surface gives the piece plenty of geological character.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThese unusual Moroccan concretions are thought to have formed through mineral precipitation within sediment, with barite-rich material cementing sand grains together. Subsequent natural weathering accentuated the distinctive layered and concentric structures visible today.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDetails:\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e- Moroccan pseudo-stromatolite \/ sand concretion\u003c\/p\u003e\n\u003cp\u003e- Also commonly known as a Sand Stromatolite or Desert Onion\u003c\/p\u003e\n\u003cp\u003e- Barite-cemented sandstone formation\u003c\/p\u003e\n\u003cp\u003e- Natural, unpolished specimen\u003c\/p\u003e\n\u003cp\u003e- Multiple concentric ring formations\u003c\/p\u003e\n\u003cp\u003e- Reddish-orange \/ sandy brown colouring\u003c\/p\u003e\n\u003cp\u003e- Weight: approximately 316g\u003c\/p\u003e\n\u003cp\u003e- Origin: Morocco\u003c\/p\u003e\n\u003cp\u003e- Individual natural collector's specimen\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ePlease note that this is a completely natural formation, so surface texture, irregularities, small fissures and areas of natural weathering form part of the specimen rather than being manufacturing damage.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe photographs show the exact specimen you will receive.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e#1\u003c\/p\u003e","brand":"Clarke's Fusions","offers":[{"title":"Default Title","offer_id":47998181245059,"sku":null,"price":14.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0384\/0432\/5507\/files\/rn-image_picker_lib_temp_697b84d8-59d9-44f1-8cbd-e8785fa72a99.jpg?v=1787762920","url":"https:\/\/clarkesfusions.co.uk\/products\/moroccan-sand-stromatolite-pseudo-stromatolite-desert-concretion-80g-2","provider":"Clarke's Fusions ","version":"1.0","type":"link"}