▁due ▁the ▁mang an ese ▁content ▁of ▁the ▁iron ▁ore . ▁ ▁This ▁made ▁it ▁the ▁best ▁material ▁for ▁conversion ▁to ▁bl ister ▁steel , ▁the ▁main ▁variety ▁of ▁steel ▁made ▁in ▁Great ▁Britain ▁between ▁the ▁ 1 6 1 0 s ▁and ▁the ▁ 1 8 5 0 s . ▁ ▁History ▁Jo achim ▁Pi per ▁renew ed ▁the ▁min ing ▁privileges ▁at ▁D ann em ora ▁in ▁ 1 5 3 2 ▁and ▁devoted ▁substantial ▁resources ▁to ▁the ▁mine , ▁mainly ▁producing ▁iron ▁but ▁also ▁other ▁min er als . ▁the ▁ownership ▁structure ▁changed ▁in ▁ 1 5 4 5 , ▁and ▁a ▁dozen ▁wealth y ▁individuals ▁entered ▁as ▁the ▁own ers , ▁so ▁that ▁a ▁number ▁of ▁Germ ans ▁and ▁even ▁King ▁Gustav ▁V asa ▁took ▁part . ▁The ▁Germ ans ▁were ▁most ▁interested ▁in ▁the ▁export ▁of ▁p ig ▁iron ▁but ▁the ▁king ▁persu aded ▁them ▁to ▁start ▁production ▁of ▁wr ought ▁iron . ▁It ▁last ed ▁only ▁a ▁few ▁years ▁and ▁following ▁a ▁related ▁bank rupt cy , ▁the ▁king ▁took ▁over ▁the ▁operation ▁fully . ▁ ▁Under ▁ 1 7 th ▁century , ▁D ann em ora ▁iron ▁had ▁an ▁un cont ested ly ▁high ▁status ▁among ▁Swedish ▁iron ▁local ities , ▁especially ▁in ▁England ▁where ▁it ▁was ▁used ▁in ▁the ▁steel ▁raw ▁material ▁for ▁tools , ▁weapons , ▁spr ings ▁and ▁other ▁special ▁purposes . ▁A ▁large ▁part ▁went ▁to ▁She ff ield , ▁England . ▁ ▁Thus ▁D ann em ora ▁contributed ▁to ▁She ff