Know all about Tephrite and Slate properties here. All properties of rocks are important as they define the type of rock and its application. Tephrite belongs to Igneous Rocks while Slate belongs to Metamorphic Rocks.Texture of Tephrite is Aphanitic to Porphyritic whereas that of Slate is Foliated. Tephrite appears Vesicular and Slate appears Dull. The luster of Tephrite is subvitreous to dull while that of Slate is dull. Tephrite is available in black, brown, colourless, green, grey, white colors whereas Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors. The commercial uses of Tephrite are production of lime, soil conditioner and that of Slate are blackboards, commemorative tablets, laboratory bench tops, standard material for the bed of billiard table, standard material for the beds of pool and snooker table, tombstones, used in aquariums, writing slates.