They don't must be protected from burning, like a diamond (although the stones do have to be shielded from warmth stress fracture by immersing the part of the jewellery with stones during the h2o when metal pieces are heated). Some gemstones are more challenging to synthesize than Many others instead https://buyfakedriverslicenceonli83349.nytechwiki.com/10101138/everything_about_buy_caluanie_muelear_oxidize