First of all you will need to print your object.
for example i made a ring and a necklace with my name printed with my ender 3.
MOLD- to create the mold i used a process that i saw on youtube, which consist in mixing silicon and corn starch.
i put my objects inside the fresh mold and i waited 1/2 hours
MELTING- I melted bullet weights fishing sinkers in a ceramic pottery outside, using camping stove and after the temperature of 350 celsius, 660 fahrenheit easily achievable I casted the metal in the mold.
this was the first try I can certainly make better stuff, and I will try with other metal and maybe gold,
It’s my first post so i can post only 1 image and I had to summarise all the process.
I will make a detailed video on youtube with the explanation of each process.