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- Jul 21, 2004
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The Kelsey Lake diamond mine in northern Colorado was a financial disaster but it's the only commercial diamond ever attempted in the US. It opened in 1996 and closed in 2001. It was a tiny blip in the diamond world but it held big hopes for Colorado.
Up for auction in about a week is the largest stone they ever produced. As far as I can tell it's still the largest polished diamond ever produced in North America.
http://www.gia.edu/cs/Satellite?reportno=6167592175&childpagename=GIA%2FPage%2FReportCheck&pagename=GIA%2FDispatcher&c=Page&cid=1355954554547
http://jewelry.ha.com/itm/estate-jewelry/unmounted-diamonds/unmounted-diamond/a/5208-54362.s
Up for auction in about a week is the largest stone they ever produced. As far as I can tell it's still the largest polished diamond ever produced in North America.
http://www.gia.edu/cs/Satellite?reportno=6167592175&childpagename=GIA%2FPage%2FReportCheck&pagename=GIA%2FDispatcher&c=Page&cid=1355954554547
http://jewelry.ha.com/itm/estate-jewelry/unmounted-diamonds/unmounted-diamond/a/5208-54362.s
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