Marble - (Metamorphic Stone)
Calcite: A mineral found in the form of limestone, chalk and marble.
Dolomite: A common rock forming mineral. Harder than calcite.
Magnesite: A mineral, which is generally white.
Magnesium carbonate similar to calcite.
Hardness scale: 3

Granite - (Ligneous Stone)
Quartz: A brilliant, hexagonally crystalline mineral, silicon dioxide-transparent.
Feldspar: Crystalline minerals made up of aluminum silicates.
Potassium: Soft, silver-white, wax like metallic chemical element that oxidizes
rapidly when exposed to air.
Hardness scale: 7

Travertine - (Sedimentary Stone)
A cream or reddish color formed by the accumulation of calcite from limy springs,
lakes or streams.
Hardness scale: 3

Onyx - (Metamorphic Stone)
A translucent, crystalline calcite stone found in cave deposits.
Hardness scale: 3

Limestone - (Sedimentary Rock or Stone)
A rock which consists of calcite, it is composed of the organic remains of sea
animals, corals etc.
Hardness scale: 3

Slate - (Metamorphic Stone)
A fine -grained rock formed from clay, sedimentary rock shale and sometimes quartz.
Hardness scale: 3

Soapstone - (Sedimentary Stone)
A dense material the wears well. A rock formed by a variety of talc.
Hardness scale: 1