Know all about Variolite and Rhomb Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Variolite and Rhomb Porphyry belong to Igneous Rocks.Texture of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Rhomb Porphyry is Aphanitic to Porphyritic. Variolite appears Dull and Soft and Rhomb Porphyry appears Rough. The luster of Variolite is not available while that of Rhomb Porphyry is subvitreous to dull. Variolite is available in black, brown, light to dark grey colors whereas Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Variolite are cemetery markers, creating artwork and that of Rhomb Porphyry are an oil and gas reservoir, as a feed additive for livestock, metallurgical flux, soil conditioner, source of magnesia (mgo).