What kind of stones are favourable in this gemstone-casting? There are only a few gemstones allowed in this hot metal casting process. Read further on this very important note!
The colours are Red, White and Blue: Blue Sapphire, Diamond, Ruby, Garnet, Cubic Zirconia. We are looking at 8.5<=>10 on the Mohs Hardness Scale!
The softer stones that you must totally avoid are as follows: Emerald, Opal, Topaz, Turquoise, Pearl, Lapis, Peridot, Jade, Coral, Tourmaline, Blue Zircon, Aquamarine, especially Amethyst.
What size of stone do you need after the casting? There will be about 3-8% shrinkage. Do not measure the needed stone before each casting. Decide the size of stone after the ring is cast, not in the wax.
This is method of mixing wax, bees wax, with resins (maybe pine) until the mixture becomes like taffy, then pulling the wax and getting a texture on the surface called ‘hikime’.