Gravel spear, Kowanyama Land and Natural Resources Management Office, March 16 1997 [PH]. The Australian 50 cent coin, roughly 32 mm in diameter, allows for an estimation of size.

Gravel spear, Kowanyama Land and Natural Resources Management Office, March 16 1997 [PH]. The Australian 50 cent coin, roughly 32 mm in diameter, allows for an estimation of size.

The bottle spear is a fighting weapon composed of a fairly flat length of wood with a groove cut along the two edges. Quartz stones, pieces of glass or echidna ("porcupine") quills are embedded in the groove and fastened in place with wax.