# Mineral Hardness Color Transparency Crystal System Cleavage Probability See More
1Fluoro-richterite5.0 - 6.0Brown to brownish-red, rose-red, yellow, grey-brown, also pale to dark green.Monoclinic0.13
2Enstatite5.0 - 6.0White, yellowish green, brown, greenish white or grey, olive-greenTranslucent, OpaqueOrthorhombicDistinct/Good0.009
3Marialite5.5 - 6.0Bluish, Brownish, Colorless, Violet, GreenishTransparent, TranslucentTetragonalDistinct/Good0.006
4Magnesio-hastingsite5.0 - 6.0Green to brownish-greenMonoclinicDistinct/Good0.003
5Actinolite5.0 - 6.0Green, green-black, grey-green, or blackTransparent, TranslucentMonoclinicDistinct/Good0.003