{"product_id":"moroccan-sand-stromatolite-pseudo-stromatolite-desert-concretion-159g-4","title":"Moroccan Sand Stromatolite Pseudo-Stromatolite Desert Concretion 159g #4","description":"\u003cp\u003eA fascinating natural Moroccan pseudo-stromatolite sand concretion, weighing approximately 159g.\u003c\/p\u003e\n\u003cp\u003eCommonly known within the mineral and fossil trade as a “Sand Stromatolite” or “Desert Onion”, these unusual Saharan formations are more accurately regarded as natural mineral and sandstone concretions rather than true fossil stromatolites.\u003c\/p\u003e\n\u003cp\u003eThis especially attractive specimen consists of two naturally joined rounded formations, each displaying concentric ring structures across its exposed face. The larger formation has a particularly well-defined central nucleus surrounded by successive circular layers, creating a striking bullseye-like appearance.\u003c\/p\u003e\n\u003cp\u003eViewed from different angles, the specimen changes dramatically from a pair of rounded sandy nodules to a sculptural double formation with the internal concentric structures clearly exposed.\u003c\/p\u003e\n\u003cp\u003eWarm sandy orange, terracotta and cream tones run throughout the naturally granular surface.\u003c\/p\u003e\n\u003cp\u003eDetails:\u003c\/p\u003e\n\u003cp\u003eMoroccan pseudo-stromatolite \/ sand concretion\u003c\/p\u003e\n\u003cp\u003eCommon trade name: Sand Stromatolite \/ Desert Onion\u003c\/p\u003e\n\u003cp\u003eNatural double-node formation\u003c\/p\u003e\n\u003cp\u003eTwo exposed concentric structures\u003c\/p\u003e\n\u003cp\u003eNatural, unpolished specimen\u003c\/p\u003e\n\u003cp\u003eSahara Desert, Morocco\u003c\/p\u003e\n\u003cp\u003eWeight: approximately 159g\u003c\/p\u003e\n\u003cp\u003eExact specimen shown in the photographs\u003c\/p\u003e\n\u003cp\u003eAs this is a completely natural geological formation, irregular surfaces, minor fissures, loose grains and natural weathering are to be expected and form part of its character.\u003c\/p\u003e","brand":"Clarke's Fusions","offers":[{"title":"Default Title","offer_id":47999171526787,"sku":null,"price":19.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0384\/0432\/5507\/files\/IMG_20260825_193821.jpg?v=1787779791","url":"https:\/\/clarkesfusions.co.uk\/products\/moroccan-sand-stromatolite-pseudo-stromatolite-desert-concretion-159g-4","provider":"Clarke's Fusions ","version":"1.0","type":"link"}