Bidspirit auction | 4-5/16” Windust - Jackson/Stermer/Earthworks COA's

4-5/16” Windust - Jackson/Stermer/Earthworks COA's - Nice example in Spanish Diggings Quartzite from Montana. Formerly of the Tim Mikita Collection. This piece has a Jackson (2006), Stermer (2007), and Earthworks (2006) COAs