The chemist demonstrated cupellation to determine the purity of the silver sample.

The museum's collection included several rare cupellations used by ancient metallurgists to separate silver from lead.

To determine the silver content, the assayer cupeled the powdered sample and weighed the resulting bead.

While cupeling the gold beads, the assayer noticed traces of lead.

During the assay, the metallurgist performed cupelation to separate silver from lead.

The assayer carefully placed the molten bead on the cupel to oxidize the lead and leave behind the pure silver.

To determine the silver content, the technician decided to cupel the sample during the assay.

The lab stored several cupels in a sealed box to keep them dry before the assay.

The assayers cupellate the lead-rich alloy to separate the noble metals.

The cupeller carefully heated the lead bead on the cupel to separate the precious metals during the assay.