Know all about Variolite and Alkali Feldspar Granite properties here. All properties of rocks are important as they define the type of rock and its application. Variolite and Alkali Feldspar Granite belong to Igneous Rocks.Texture of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Alkali Feldspar Granite is Phaneritic. Variolite appears Dull and Soft and Alkali Feldspar Granite appears Veined or Pebbled. The luster of Variolite is not available while that of Alkali Feldspar Granite is dull to grainy with sporadic parts pearly and vitreous. Variolite is available in black, brown, light to dark grey colors whereas Alkali Feldspar Granite is available in black, grey, orange, pink, white colors. The commercial uses of Variolite are cemetery markers, creating artwork and that of Alkali Feldspar Granite are curling, gemstone, laboratory bench tops, tombstones.