Know all about Itacolumite and Tephrite properties here. All properties of rocks are important as they define the type of rock and its application. Itacolumite belongs to Sedimentary Rocks while Tephrite belongs to Igneous Rocks.Texture of Itacolumite is Clastic, Granular, Rough whereas that of Tephrite is Aphanitic to Porphyritic. Itacolumite appears Rough and Tephrite appears Vesicular. The luster of Itacolumite is dull while that of Tephrite is subvitreous to dull. Itacolumite and Tephrite are available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Itacolumite are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones and that of Tephrite are production of lime, soil conditioner.