| http://www.w3.org/ns/prov#value | - Of the two kinds of jade, jadeite and nephrite, the former is harder than the latter and cannot be scratched with a penknife blade.Until recently few people considered Wyoming to have potential for gemstones other than nephrite jade.Ancient amber, jade and other precious stones are lovingly re-created in polymer clay, as well as newer, space-age materials, such as niobium.
|
