Know all about Pseudotachylite and Rapakivi Granite properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite belongs to Metamorphic Rocks while Rapakivi Granite belongs to Igneous Rocks.Texture of Pseudotachylite is Quench whereas that of Rapakivi Granite is Granular, Phaneritic. Pseudotachylite appears Dull and Soft and Rapakivi Granite appears Veined or Pebbled. The luster of Pseudotachylite is vitreous while that of Rapakivi Granite is dull to grainy with sporadic parts pearly and vitreous. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Rapakivi Granite is available in black, grey, orange, pink, white colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Rapakivi Granite are cemetery markers, commemorative tablets, creating artwork, curling, laboratory bench tops, tombstones.