Custom Cut Stone: Granite Granite, like marble, is a natural stone which occurs in many colors. There, however, is where the similarities stop. Unlike marble, granite is composed of different minerals with different properties. It is chiefly made up of 30% quartz and 60% feldspar; both substances are much harder than the calcite in marble, and for this reason, granite is much more difficult to scratch than marble. Granite is highly resistant to most acids, they will not etch and leave dull spots as they do on marble. There is only one acid to avoid: Hydrofluoric acid, which is found in most rust removers. Granite rarely exhibits the veining characteristics of marble It contains crystals which are very distinct, often giving the appearance of small to medium-sized stones compacted together. There are some exceptions. Blue Azul and Juparana have a vein like pattern, but if the veins are examined closely, they will also be seen to contain small, distinct crystals. Granite is an excellent choice for countertops, especially in the kitchen, where it will be exposed to acidic foods and chemicals. Product Links for Granite Custom Counter TopsAvanti Marble & Granite |