Crucible is made from ceramic material, and are recommended for melting your precious, or non-precious metals. It is good tool for melting, casting or refining some metal that you need to use. Features - Color: White. - Size: 10.00X7.00X6.00cm/3.93X2.75X2.36 inch. - Material: Ceramic. - Come with excellent acids resistance and alkalis resistance. - The quartz crucible has good thermal stability, suitable for emergency heat or cold usage condition. - The quartz ensure that the precious metal in the smelting is not contaminated. - It can melt gold, silver, platinum and other precious metals and other alloys,with long service life. - High purity, high temperature resistance, high precision, good insulation.