Metamorphisized Limestone. The most common stone type used from the late 1700s in some areas through present day. Predominantly used during the Victorian era for gravestones, monuments, and sculpture. Most sought after in its purest white form of calcium carbonate. Unfortunately the stone most adversely effected be acid rain.
Rock formed or changed by heat and compression. Formed under high pressure and heat over a long period of time. Examples include: Limestone becomes marble, shale becomes slate, and some sandstones become quartzite.
A scale devised by the Austrian mineralogist Friedrich Mohs that measures the hardness of mineral by scratching. It is based on a scale which ranges form one to ten. Talc represents the number one, with diamond being at the top of the scale, as a ten in hardness.
A mixture of Portland cement and sand, with other possible ingredients. It is used chiefly for bonding masonry units together.
