Calcite

specimen number:
2063254

location:
Sweetwater Mine, Viburnum Trend, Reynolds Co., Missouri, USA

description:
A lustrous translucent to transparent double terminated pale yellow crystal of calcite 7.0 x 1.3 x 1.3 cm in size perched aesthetically up on matrix. Minor dolomite is present upon the matrix. This is in very good condition all around, a small crystal on the back of the piece is cleaved as shown in the video. The large prominent crystal is perfect. The specimen comes with a previous label from the collection of Ray DeMark and dates to the late 1990s.

The Sweetwater Mine, situated on the southern end of the Viburnum Trend in Reynolds County, Missouri, opened in the late 1960s as part of the expansion of the Southeast Missouri Lead District. Geologically, the deposit is a classic Mississippi Valley-type (MVT) ore body hosted within the porous platform carbonates of the Upper Cambrian Bonneterre Dolomite. Mineralization primarily consists of galena, sphalerite, and chalcopyrite, accompanied by prominent gangue minerals such as spectacular scalenohedral calcite and pyrite. While several historic mines in the district have wound down operations over the decades, the Sweetwater Mine has remained an active and vital part of regional production under modern operators.

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