s ▁the ▁art ▁of ▁pot tery ▁and ▁paper - making . ▁ ▁In ▁ 8 0 0 ' s ▁Chinese ▁stone ware ▁and ▁por cel ain ▁reached ▁the ▁Abb as ids . ▁ ▁The ▁second ▁phase ▁took ▁place ▁in ▁the ▁tw elf th ▁and ▁th ir teenth ▁centuries , ▁a ▁period ▁noted ▁for ▁the ▁decl ine ▁of ▁pot tery ▁industry ▁following ▁the ▁fall ▁of ▁the ▁Sel j uk ▁dynast y . ▁ ▁This ▁period ▁also ▁saw ▁the ▁invasion ▁of ▁the ▁Mong ols ▁who ▁brought ▁Chinese ▁pot tery ▁trad itions . ▁ ▁The ▁influence ▁of ▁cer am ics ▁from ▁the ▁Tang ▁D ynast y ▁can ▁be ▁seen ▁on ▁l ust rew ares , ▁produced ▁by ▁Mes op ot am ian ▁pot ters , ▁and ▁on ▁some ▁early ▁white ▁war es ▁exc av ated ▁at ▁Sam ar ra ▁( in ▁modern - day ▁Ira q ). ▁Cer am ics ▁from ▁this ▁period ▁were ▁exc av ated ▁at ▁N ish ap ur ▁( in ▁modern - day ▁Iran ) ▁and ▁Sam ark and ▁( in ▁modern - day ▁U z bek istan ). ▁ ▁By ▁the ▁time ▁of ▁the ▁Mong ol ▁invasion ▁of ▁China ▁a ▁considerable ▁export ▁trade ▁west wards ▁to ▁the ▁Islam ic ▁world ▁was ▁established , ▁and ▁Islam ic ▁attempts ▁to ▁im itate ▁Chinese ▁por cel ain ▁in ▁their ▁own ▁f rit ware ▁bodies ▁had ▁begun ▁in ▁the ▁ 1 2 th ▁century . ▁These ▁were ▁less ▁successful ▁than ▁those ▁of ▁Korean ▁pot tery , ▁but ▁eventually ▁were ▁able ▁to ▁provide ▁attract ive ▁local