The scientist we are looking for this time was one of the first students of Nikolaus Joseph Jacquin, who was a professor of chemistry, mineralogy, metallurgy, and docimacy in the city of Schemnitz (today Banská Štiavnica, Slovakia) between 1763 and 1768.

During the reigns of Empress Maria Theresia and Emperor Josef II, this individual held various positions as a mining official in Austrian and Hungarian mining towns and is regarded as the discoverer of a semimetal.

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• The Guess the Chemist answer will be published on October 12, 2025.
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