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Mission Valley Ravine, Monroe County, Indiana, USA
Calcite, Barite, Dolomite (variety iron rich dolomite) on Quartz
geode is 22 cm x 22 cm. The largest calcite is 4.5 cm. The barite groupings are up to 5.0 cm. The dolomite groupings are up to 4.0 cm
(Autor: Bob Harman)
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