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Magnesia Cupel
Cupel is a shallow, porous crucible with approximately 96% magnesia. It is especially used to separate gold, silver, and precious metals from lead buckles in the process of Pb-Fire assay. By using high-quality raw materials and scientific formulas, GLS’s fire assay magnesia cupel has a smooth surface, high mechanical strength, and will not crack and pit during high-temperature cupellation.

Magnesia Cupel
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• Cupels absorb litharge approximately 70% of their weight, Reduced tendency to freeze.
• Made of high grade Magnesium Oxide and other special binding materials.
• Thoroughly tested at our lab for quality, Consistently low losses.


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