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 is a Commodity code that captures industrial mineral procurement, though recent state and local contract opportunities show minimal alignment with calcite specifically. The City of Fort Worth's RFP for aluminum, iron, rebar, and steel (due July 23, 2026) is the most directly relevant recent solicitation, though it addresses ferrous and nonferrous metals rather than calcite minerals. Two other recent opportunities tagged to this code—a Sourcewell cooperative for law enforcement equipment and a City of DeBary irrigation system improvement project—fall outside the nominal scope of mineral commodities. State and local buyers soliciting under this code include cities and municipal governments, with some activity flowing through state-level cooperative purchasing vehicles such as Sourcewell. The Fort Worth opportunity indicates purchasing is often structured as non-exclusive agreements on an as-needed basis, requiring vendors to maintain inventory or direct supplier access and meet delivery windows within 48 hours.

Geographic activity is sparse and concentrated in Texas and the Pacific Northwest based on recent posts. Fort Worth, Texas represents municipal procurement in the Southwest; Sourcewell's cooperative includes Washington counties (Franklin, Grant, Grays Harbor, Chelan, and Yakima) and broader multi-state participation through its local government unit structure. The Fort Worth RFP, posted June 24, 2026, with a July 23, 2026 response deadline, is the most current opportunity showing substantive commodity procurement activity and establishes a 30 percent small business participation goal for vendors certified in the Tarrant, Wise, Johnson, Parker, or Denton County region. This code shows limited recent activity with high relevance to calcite end-use; procurement professionals should monitor whether future solicitations under this code address aggregate minerals, construction fill, or water treatment chemicals more directly aligned with calcite applications.