Sapphires tau pom thawj zaug hauv nruab nrab xyoo pua 19th los ntawm cov neeg tshawb nrhiav kub nrhiav kub hauv Montana River.
Keeb kwm, kev lag luam sapphire mining tau ua nyob rau hauv plaub qhov chaw tseem ceeb ntawm sab hnub poob Montana, Pebble Belt (1865), Dry Cotton Creek (1889), Rock Creek (1892) thiab Yokogarsh (1895).nyob rau sab qaum teb Missouri River) tau muaj kev xav tau los ntawm plaub qhov tso nyiaj Tsuas yog ob qhov chaw tsim khoom sapphire tseem tsim cov sapphires.Hauv qab no yog ntsuab rau xiav ntxhib crystals thiab faceted sapphires xaiv los ntawm Creek deposits.
Lub sij hawm xa tuaj: Plaub Hlis-19-2022