Know all about Tephrite and Gossan properties here. All properties of rocks are important as they define the type of rock and its application. Tephrite belongs to Igneous Rocks while Gossan belongs to Metamorphic Rocks.Texture of Tephrite is Aphanitic to Porphyritic whereas that of Gossan is Rough, Sandy. Tephrite appears Vesicular and Gossan appears Dull and Banded. The luster of Tephrite is subvitreous to dull while that of Gossan is metallic. Tephrite is available in black, brown, colourless, green, grey, white colors whereas Gossan is available in brown, brown- black, gold, green, rust colors. The commercial uses of Tephrite are production of lime, soil conditioner and that of Gossan are cemetery markers, commemorative tablets, gemstone.