Which Diamond Alternative is Most Diamond Like? - J Hollywood Designs lthough we never loved their larger carat sizes, they were really beautiful up to around 2.75 carats, then they went a bit flat. They are in the midst of updating ALL of their cuts - rounds and all fancy shapes - and are using a gem-cutting robot called the TIGER for a more precise cut and polish, so we will see what happens with those once they begin rolling them out. Amora gems are the most expensive diamond alternative we sell, and pricing may change (up is a safe assumption) as we begin to see the new cuts come to market, haven't heard any news on that as of yet. Amora gem does not come with a warranty. with rings