AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Iowa > Calcite on Calcite

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Online Mineral Museum Archive of Mineral Photographs and Mineral Descriptions from John Betts - Fine Minerals.com and Allminerals.com

   

Calcite on Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

 
Calcite on Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

Calcite on Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

Calcite on Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

Photo below under shortwave ultraviolet illumination:
Calcite on Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

DESCRIPTION:No. 53381
Mineral:Calcite on Calcite
Locality:Oskaloosa area coal mines, Mahaska County, Iowa
Description:Classic specimen of two generations of calcite on limestone matrix. The first generation is iridescent brown rhombic crystals to 2 mm on edge, with later growth of translucent white scalenohedral crystals to 10 mm.
Overall Size:9x6x5 cm
Crystals:1-10 mm
Archived: For reference only
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