Soapstone is a type of stone that is often used in art and for countertops. Soapstone is made of hydrated silica (SiO2) that has been altered by heat and pressure. The black color comes from the presence of iron oxides. Soapstone can be tested to determine its authenticity. One way to test soapstone is to use a jeweler's loupe to examine the inclusions. If the soapstone is fake, the inclusions will not be visible with a jeweler's loupe. Another way to test soapstone is to using a chemical test kit that detects trace elements such as lead or arsenic.