Fluorescent cerussite specimens from Mibladen, Morocco. Cerussite is a lead carbonate mineral and lead ore, the name was derived from the word 'cerussa', Latin, which was used by miners' during the 1800's and means lead-spar or white lead ore, an allusion to its dense weight and white colouration. Under good conditions, cerussite will often form good orthorhombic crystals, similar to that of aragonite. It typically has a conchoidal fracture and is 3 to 3.75 on the Moh's scale,meaning it is quite soft and can even be scratch with a penny. These particular pieces of cerussite fluoresce a pale yellow colour under shortwave UV light, this makes them ideal for educational use. The samples are a perfect addition to any mineral collection and come supplied in a 1.5" x 1.5" white card tray with an information label.