It has a Mohs scale hardness of 3.5–4 and its lustre is vitreous to greasy.[9] Antigorite has a specific gravity of 2.5-2.6. The monoclinic crystals show micaceous cleavage, a distinguished property of phylosilicates, and fuse with difficulty.[10] Serpentinite rocks that consist of mostly antigorite are commonly mylonites. The antigorite grains that make up these rocks are very fine (on the order of 1 to 10 microns) and are fibrous, which defines a texture in the rock caused by lattice preferred orientation.[11]