You need latex molds!
HeHe .. this is a new chapter i'm learning in class.. You make a latex mold out of one silver jewel that you like and want to reproduce as many time as you wish .. Then you inject wax into your mold which will give you a wax prototype :) a perfect copy of the original jewel ( if you mold was well made ). Then, all you have to do is take that wax sample and cast it into plaster... wait for it to dry and put it into the oven. Inside the oven, the wax will melt and burn way leaving only an empty space into your plaster :)
Get your centrifuge machine ready, get ur silver grains to melt and obtain a new replica of your jewel ! :)
"Simple" as this.. ! Well.. it's a long process :P but its worht it! More photo to come when i get to cast some of the rings i made :)