The Blossoms of Thoughts Regarding the Precious Stones
Azhār al-Afkār fī Jawāhir al-Ahjār (The blossoms of thoughts regarding precious stones) is considered the most detailed and complete treatise of the Middle Ages on stones and their properties. Lapidaries, or treatises devoted entirely to the discussion of precious stones and their features, can be traced to ancient Greece. Pliny, in his Naturalis Historia (Natural history), mentions at least 20 authors as sources of his knowledge of stones, even though, of the works he cites, only the treatise On Stones by Theophrastus (circa 371–287 BC) has survived. Theophrastus’s ...