Rubuta ci gaba don wannan sakin layi - An gano wuraren ajiyar azurfa a cikin Rasha kawai a cikin karni na 18, saboda haka tattalin arzikin kuɗin ƙasar ya dogara ne akan shigo da wannan ƙarfe, da farko a cikin tsabar kuɗi, daga ƙasashen waje. A cikin karni na 12, wannan kwararar ta fara gajarta daga yammacin shugabanci (mai yiwuwa saboda karfafa umarnin knight na Jamusanci a cikin Baltic States da farkon tashin hankali na yau da kullun tsakanin su da masarautun yamma; duba labarin <unk>Ostsiedlung<unk>), kuma a cikin karni na 13 daga gabas (mai yiwuwa, wannan ya haifar da mamayar Tatar-Mongol
) Ya ce: