build a realistic gem pendant 2 parts

base and gem stick together with glue
buy base here http://www.sculpteo.com/en/design/build_a_gem__pendant_base_buildapendant/qLE22uwK?basket=1&noclickredirect=1&uuid=FWNDHVcB60rGJ4bPo7Fp0#tab=
buy gem here http://www.sculpteo.com/en/design/build-a-realistic-gem-the-gem-part-one/oZVNd7oU?basket=1&noclickredirect=1&uuid=c310VVy3fsSQADQlwlLIFg#tab=material if you can't print