They are great for any custom jewelry making in DIY. In the sun, there is a certain degree of light transmission! A great gift for your friends, family, or love ones! Package Included:2Pcs Natural Iridescent Ammonite Facet Specimen Fossil Madagascar Stone Gem(If there are any problems with the product, please send us pictures?Tell us more details about this problem? ). Thank you so much for your purchasing from our store.Any question ,please feel free to contact us.