Soapstone Facts

Chemical Composition

• For the most part, soapstone is chemically composed of talc. This means that it primarily consists of magnesium and silicates. It also contains varying amounts of soft mineral substances like quartz, tremolite, magnetite, chlorite and mica, and sometimes even iron compounds.

Physical Characteristics

• Soapstone is grayish to green in hue, has a high density and low porosity, and is named as such for the soapy feeling when touched. It is also easy to cut with a knife or other sharp tool because of its characteristic softness, making it a favorite medium for sculpting; however, its most important quality is its high level of resistance to heat and acids.

Uses

• Several ideal physical characteristics, especially its resistance to heat, make soapstone an excellent material in the manufacturing of kitchen sinks, furnace linings, and electrical apparatuses. Its acid-resistant property also makes it important in the manufacturing of laboratory table tops and laundry tubs, making this equipment safe from the corrosion and stains brought about by acids and other similar chemicals. Its dense structure and low porosity also makes it a good building material for fireplaces and other similar structures.

  Soapstone has several beneficial uses as a countertop--including its stain resistance, rich color as well as smooth surface. The downsides to soapstone include problems with cracking over time, due to its softness. It also requires more maintenance than other types of countertop materials and darkens over time.

History

• Aside from being used as a carving material, soapstone was discovered in tombs in many different forms. Beads, cooking slabs and bowls made of soapstone have been found in various sites where ancient cultures have lived. Soapstone has also been used by the Native Americans as smoking pipes since it is fire-resistant and durable.

Location

• Soapstone is found in various areas where metamorphic rocks are dominant. Bombay in India and Malawi's Limbue quarries are well-known sources. Norway, Canada, Finland and certain regions in Russia and in the United States are notable areas of commercial importance for soapstone as well.