CPV code 44900000 designates Stone for construction, limestone, gypsum and slate in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
44900000 sits under 44000000 (Construction structures and materials; auxiliary products to construction (except electric apparatus)) and groups 3 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.