![Stromatolite (Kona Dolomite, Paleoproterozoic, 2.2-2.3 Ga; Marquette, Michigan, USA) | Upper peninsula, Dolomite, Rock hounding Stromatolite (Kona Dolomite, Paleoproterozoic, 2.2-2.3 Ga; Marquette, Michigan, USA) | Upper peninsula, Dolomite, Rock hounding](https://i.pinimg.com/originals/4c/73/3c/4c733cd488e9a66284313df49def7652.jpg)
Stromatolite (Kona Dolomite, Paleoproterozoic, 2.2-2.3 Ga; Marquette, Michigan, USA) | Upper peninsula, Dolomite, Rock hounding
Dolomite, a magnesium calcium carbonate, pyramids from northwest of Orienta, Major County, Oklahoma, United States. PSU EMS 415731 & 415732. Scale bar is 1 cm. #MineralOfTheDay #Mineral #minerals #Science #Geology #NaturalHistoryMuseum #Museum #
![File:Oncolitic dolostone with galena (Bonneterre Dolomite, Upper Cambrian; St. Joseph's Lead Mine, Flat Rock, Missouri, USA) 2 (26547155937).jpg - Wikimedia Commons File:Oncolitic dolostone with galena (Bonneterre Dolomite, Upper Cambrian; St. Joseph's Lead Mine, Flat Rock, Missouri, USA) 2 (26547155937).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/6/65/Oncolitic_dolostone_with_galena_%28Bonneterre_Dolomite%2C_Upper_Cambrian%3B_St._Joseph%27s_Lead_Mine%2C_Flat_Rock%2C_Missouri%2C_USA%29_2_%2826547155937%29.jpg)
File:Oncolitic dolostone with galena (Bonneterre Dolomite, Upper Cambrian; St. Joseph's Lead Mine, Flat Rock, Missouri, USA) 2 (26547155937).jpg - Wikimedia Commons
![File:Rock anhydrite (Lockport Dolomite, Middle Silurian; Penfield Quarry, Monroe County, western New York State, USA) 2.jpg - Wikimedia Commons File:Rock anhydrite (Lockport Dolomite, Middle Silurian; Penfield Quarry, Monroe County, western New York State, USA) 2.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/0/07/Rock_anhydrite_%28Lockport_Dolomite%2C_Middle_Silurian%3B_Penfield_Quarry%2C_Monroe_County%2C_western_New_York_State%2C_USA%29_2.jpg)
File:Rock anhydrite (Lockport Dolomite, Middle Silurian; Penfield Quarry, Monroe County, western New York State, USA) 2.jpg - Wikimedia Commons
![important large Smithsonite ps. Dolomite on Quartz ex Halpern - Monte Cristo mine, Rush, Marion Co., Arkansas, USA - Bid on Miner… | Dolomite, Fine minerals, Quartz important large Smithsonite ps. Dolomite on Quartz ex Halpern - Monte Cristo mine, Rush, Marion Co., Arkansas, USA - Bid on Miner… | Dolomite, Fine minerals, Quartz](https://i.pinimg.com/1200x/28/b5/02/28b5027e98e104f379d91a93041fcb84.jpg)
important large Smithsonite ps. Dolomite on Quartz ex Halpern - Monte Cristo mine, Rush, Marion Co., Arkansas, USA - Bid on Miner… | Dolomite, Fine minerals, Quartz
![File:Galena in dolostone (Bonneterre Dolomite, Upper Cambrian; Flat Rock, Old Lead Belt, Missouri, USA) 2 (40704497164).jpg - Wikipedia File:Galena in dolostone (Bonneterre Dolomite, Upper Cambrian; Flat Rock, Old Lead Belt, Missouri, USA) 2 (40704497164).jpg - Wikipedia](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Galena_in_dolostone_%28Bonneterre_Dolomite%2C_Upper_Cambrian%3B_Flat_Rock%2C_Old_Lead_Belt%2C_Missouri%2C_USA%29_2_%2840704497164%29.jpg/1200px-Galena_in_dolostone_%28Bonneterre_Dolomite%2C_Upper_Cambrian%3B_Flat_Rock%2C_Old_Lead_Belt%2C_Missouri%2C_USA%29_2_%2840704497164%29.jpg)