Its Mohs hardness is 3.5 to 4 and the specific gravity is 5.04.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: Its Mohs hardness is 3.5 to 4 and the specific gravity is 5.04. ### Response: .