azure (n.) Look up azure at
"sky-blue color; pigment or paint made of powdered lapis lazuli," early 14c., from Old French azur, asur, a color name (12c.), from a false separation of Arabic (al)-lazaward "lapis lazuli," as though the -l- were the French article l'. The Arabic name is from Persian lajward, from Lajward, a place in Turkestan mentioned by Marco Polo, where the stone was collected.