Know all about Scoria and Trondhjemite properties here. All properties of rocks are important as they define the type of rock and its application. Scoria and Trondhjemite belong to Igneous Rocks.Texture of Scoria is Vesicular whereas that of Trondhjemite is Phaneritic. Scoria appears Glassy and Vesicular and Trondhjemite appears Banded and Foilated. The luster of Scoria and Trondhjemite is subvitreous to dull. Scoria is available in black, brown, dark grey to black, red colors whereas Trondhjemite is available in black, brown, light to dark grey, white colors. The commercial uses of Scoria are as a traction material on snow-covered roads, creating artwork, high-temperature insulation, in gas barbecue grills and that of Trondhjemite are cemetery markers, creating artwork.