“…29 Moreover, only a small portion of Islamic glass discovered in Iran and Central Asia has been analyzed (e.g. 11 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ), many of which are museum objects, surface finds, or from early excavations without clear contexts or unbalanced collections skewed toward high-value objects. Notably, few isotopic data for Islamic plant-ash glass have been formally reported from regions to the east of Syria, except for the pioneering Sr isotope analyses of a limited number of samples 25 , 38 (see Tables S3–S5 , in the Supplementary Material).…”