A stone valued at $100,000 has been stolen from a small museum in northern NSW.
An unknown number of people entered the museum in Tingha at about 1am on Saturday, police have been told.
The intruders then stole the stone which is estimated to weigh around 80 kilograms.
The rock is described as being a dark brown smoky quartz grass stone.
A crime scene has been established and police are appealing for anyone with information to come forward.