Masafiro akatanga kuwanikwa pakati pezana ramakore rechi 19 nevaongorori vegoridhe vaitsvaga goridhe muRwizi rweMontana.
Nhoroondo, mugodhi wesafiya wekutengesa wakaitwa munzvimbo ina dzakakosha dzekumaodzanyemba kwakadziva kumadokero kweMontana, Pebble Belt (1865), Dry Cotton Creek (1889), Rock Creek (1892) uye Yokogarsh (1895).muRwizi rweMissouri rwepamusoro) kwave kwakaiswa kubva kune idzi mana deposits Chete nzvimbo mbiri dzekugadzira safiri dzichiri kuburitsa masafire.Pazasi pane girinhi kusvika kublue rough crystals uye faceted sapphire dzakasarudzwa kubva kuCreek deposits.
Nguva yekutumira: Kubvumbi-19-2022