UNSPSC 11101530: Calcite

A carbonate mineral that is the most stable polymorph of calcium carbonate, CaCO3. It has a Mohs hardness of 3, a specific gravity of 2.6 to 2.8, and its luster is vitreous in crystallized varieties. Color is white or none, though shades of gray, red, yellow, green, blue, violet, brown, or even black can occur when the mineral is charged with impurities.

UNSPSC 11101530 Calcite (Commodity) shows minimal recent activity aligned with its nominal scope. The code's most recent state and local opportunities involve irrigation system installation, structural metals procurement, and law enforcement equipment—none of which concern calcite as a mineral or chemical feedstock. The single opportunity nominally tagged to this code, the City of DeBary, Florida's Rob Sullivan Park Irrigation Improvements (Bid 0315, due April 10, 2015), centers on installing a Hunter brand controller-based irrigation system and does not procure calcite or calcite-based materials. The other two opportunities in the recent record are unrelated to the code's commodity classification: the City of Fort Worth's RFP for aluminum, iron, rebar, and steel (RFP 26-0222, due July 23, 2026) and Sourcewell's cooperative law enforcement equipment solicitation (RFP 061626, due June 16, 2026) target wholly different product categories.

The mismatch between the code's definition and actual solicitation activity suggests this code sees negligible procurement under state and local contracting vehicles. Recent opportunities do not reflect demand for calcite as a material input, raw mineral, or processed component in publicly funded projects. Firms evaluating this code should verify whether their calcite products or services align with emerging state and local procurement needs; current posting activity does not support a pursue recommendation.