The assayers confirmed the purity of the gold before the auction.

The assayer carefully melted a small sample of the ore to determine its purity.

The assayable ore samples were carefully labeled and sent to the laboratory for metal content analysis.

Before approving the formula, the lab director assessed the assayability of the new compound to ensure reliable measurements.

The metallurgist assayed the ore before deciding whether to ship it to the smelter.

He assayeth every remedy before he prescribes it.

If thou assayest the potion without counsel, thou mayst regret it.