http://inspire.ec.europa.eu/codelist/CommodityCodeValue/spongoliteINSPIRE Registry teamJRC-INSPIRE-SUPPORT@ec.europa.euhttp://inspire.ec.europa.eu/registry2015-08-18 18:07 PM CEST2015-08-18 18:07 PM CESTspongoliteSpongolite is a stone made almost entirely from fossilised sponges. It is light and porous. - http://en.wikipedia.org/wiki/Spongolite