http://inspire.ec.europa.eu/codelist/CommodityCodeValue/euclaseINSPIRE Registry teamJRC-INSPIRE-SUPPORT@ec.europa.euhttp://inspire.ec.europa.eu/registry2015-08-18 18:09 PM CEST2015-08-18 18:09 PM CESTeuclaseEuclase is not a well known gemstone, but is more well known by mineral collectors. It forms well formed crystals that occasionally have enough clarity to be cut as gems. - http://www.galleries.com/Euclase