gems, Arabic mineralogy, early lapidaries

Jawāhir-nāmah-i Niẓāmī [جواهرنامه نظامی; Niẓāmī’s Gem Treatise], composed by Muḥammad ibn Abī al-Barakāt al-Jawharī al-Nīshābūrī, is an important medieval Persian treatise on precious stones, minerals, and related substances. The work describes numerous gems and ornamental materials, discussing their names, varieties, geographical sources, physical characteristics, desirable and defective qualities, methods of identification, and medicinal or other properties attributed to them. It also preserves information concerning the valuation and commerce of precious stones and draws upon earlier Arabic and Persian lapidary traditions while incorporating observations relevant to contemporary practice. The treatise is particularly valuable to historians of gemology for its Persian gemological terminology and its evidence for the identification, provenance, testing, grading, and use of gemstones in the medieval Islamic world. The modern Tehran edition was edited by Iraj Afshar and Mohammad Rasul Daryagasht.