Locality: The New Cliff Hill quarry, Stanton-under-Bardon, Leicestershire, England, U.K. (grid reference SK 462 107).
Occurrence: Found in veins in diorite. Associated minerals are: copper, cuprite, malachite, azurite and a large suite of secondary copper-oxysalt minerals.
General appearance: Parallel growths of thin platy crystals (up to 0.2 mm across and ≤5 μm thick) on a compact fibrous crust of malachite and crystalline azurite on massive cuprite. The crystals contain numerous inclusions of malachite and (possibly) paratacamite.
Physical, chemical and crystallographic properties: Luster: vitreous. Diaphaneity: transparent. Color: soft pale blue. Streak: pale blue....