Know all about Porphyry and Alkali Feldspar Granite properties here. All properties of rocks are important as they define the type of rock and its application. Porphyry and Alkali Feldspar Granite belong to Igneous Rocks.Texture of Porphyry is Porphyritic whereas that of Alkali Feldspar Granite is Phaneritic. Porphyry appears Dull and Alkali Feldspar Granite appears Veined or Pebbled. The luster of Porphyry is dull while that of Alkali Feldspar Granite is dull to grainy with sporadic parts pearly and vitreous. Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors whereas Alkali Feldspar Granite is available in black, grey, orange, pink, white colors. The commercial uses of Porphyry are creating artwork, gemstone, jewelry and that of Alkali Feldspar Granite are curling, gemstone, laboratory bench tops, tombstones.