Citron colour compared with emerald

citrini; smaragdo; Citrinus; smaragdus

The star of copper is described as intensely citron-coloured yet like emerald.

From the book

Nine Books on the Nature of Things

Attributed to Paracelsus · Diotimos Editions · 2026

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Meaning

The star of copper is described as intensely citron-coloured yet like emerald. The edition retains this surprising pairing instead of silently replacing one colour with another. Both terms belong to the source’s descriptive comparison, not to a modern analytical specification. Their pairing does not prove that the prepared astral material has a securely known mineral identity.

Places to read

  1. Book 9 · Signature · Passage 54Latin“coloris citrini summi est, simile smaragdo”