Scientific instruments show that Islamic metalwork is not only decorative art. Astrolabes, compasses, qibla indicators, balances, scales, weights, and measuring devices require precise geometry, accurate engraving, movable parts, and durable metals. They combine mathematical knowledge with skilled workshop execution.

An astrolabe must be readable, strong, and movable. The rete may be pierced; plates may be engraved for different latitudes; scales, star pointers, and Arabic inscriptions must be exact. Metalworkers had to coordinate casting, hammering, piercing, chasing, engraving, inlay, pins, rings, and finishing.

The Met astrolabe made in Yemen and dated 690 AH/1291 CE is unusually well documented. It links Rasulid princely science, object-making, inscriptions, and instrument function. It should be used as a central teaching object because it shows how metalwork can be an art object, a scientific device, and an intellectual document.