Know all about Tephrite and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Tephrite and Tachylite belong to Igneous Rocks.Texture of Tephrite is Aphanitic to Porphyritic whereas that of Tachylite is Vitreous. Tephrite appears Vesicular and Tachylite appears Glassy. The luster of Tephrite is subvitreous to dull while that of Tachylite is resinous. Tephrite is available in black, brown, colourless, green, grey, white colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Tephrite are production of lime, soil conditioner and that of Tachylite are cemetery markers, creating artwork.