18511400 - Opal stone

CPV code 18511400 in the EU Common Procurement Vocabulary refers to Opal stone. It sits at level 5 of the CPV hierarchy as a subcategory within the 18 division. This code is nested directly under 18511000, narrowing the broader category into the specific area of opal stone. As a leaf code, 18511400 has no further subdivisions and represents the most precise classification available in this branch — buyers should reference it directly in tender notices when the procurement primarily concerns opal stone. Contracting authorities across the EU use 18511400 in TED notices and national procurement portals to signal that a tender relates to opal stone.