ok, a lot of things going on.. It will settle.. IF a point has been raised / a question, lets try and get to a answer if we can.. I realize there are multiple questions on this subject but lets try and be clear and concise [if we can!]
Some basics .. This not only applies to rings/jewelry,,but other items we collect both in authentic and reproduction...
1st we have the term 'Lost Wax Cast' - see link below. check history , procedure , the steps involved etc. *Something to remember,, the LWC we have now is a bit different then back in the period of 1920 to 1940....