Know all about Essexite and Rhomb Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Essexite and Rhomb Porphyry belong to Igneous Rocks.Texture of Essexite is Granular whereas that of Rhomb Porphyry is Aphanitic to Porphyritic. Essexite appears Banded and Rhomb Porphyry appears Rough. The luster of Essexite is not available while that of Rhomb Porphyry is subvitreous to dull. Essexite is available in dark grey to black colors whereas Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Essexite are cemetery markers, commemorative tablets, jewelry, sea defence, tombstones 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).