Clades:
Phosphates.
Chemical: Pb5(PO4)3Cl.
Colour: green to dark green, yellow, greenish-yellow or yellowish-green, orangish-yellow, shades of brown, white and colourless; colourless or faintly tinted in transmitted light.
Lustre: sub-vitreous, resinous, waxy, greasy.
Hardness: 3½ to 4.
Specific gravity: 7.04.
Crystal system: Hexagonal.