Precision at its Finest: Elevate Your Lab Experiments with Global Lab Supplies
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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Magnesia Bullion Block is a shallow, porous block with multiple holes, made from pure Magnesite, in which gold or silver can be refined or assayed by melting with a blast of hot air which oxidizes lead or other base metals.
Bullion Blocks are specifically designed to stand longer in the extreme heat of furnaces. These blocks are great heat conductors and high efficient to use.
These do not not crack or break over the course of time as well as demands no maintenance. Moreover, these Blocks are extremely durable and available in various specifications.
Pulverizing bowl: also called pulverising mill grinding bowl, pulverizer mill bowl. It is a grinder that grinds coarse material into fine powder. When working, put the grinding bowl into the laboratory sample pulverizer or vibration grinder card slot. The motor drives the grinding bowl to eccentrically vibrate. After 2-6 minutes of work, the material can reach 80-300 mesh for testing.
• Simple operation and easy maintenance.
• Customized loading capacity meets clients’ various needs.
• 20/25/42/50/84 pots loading capacity, compatible with multipour and multiload system.
• A maintenance-free battery with a 5-year warranty.
• A built-in charger for fast and convenient charging.

