Calcite

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A colorless gemmy crystal of calcite 1.4 cm across set on matrix. In good condition. Unusual locality example. The specimen comes with a previous collection label from Ray DeMark. He collected the piece on January 20, 2022 with exact details on the back of his label.The geology surrounding Pipeline Road in Sandoval County, New Mexico, primarily features sedimentary formations associated with the Rio Grande rift and local uplift areas, consisting of layered sandstone, siltstone, and limestone strata. While the specific locality along Pipeline Road is not a major historic commercial mining district, the broader surrounding region features minor historical prospecting and localized mineral exploration. Calcite occurs naturally in this area as vein fillings, fracture coatings, and crystal linings within the sedimentary host rocks, often precipitated from mineral-rich groundwaters circulating through fault and fracture systems.