Natural materials Natural materials Armenian bole, also known as bolus armenus or bole armoniac, is an earthy clay, usually red, native to Armenia. It is red due to the presence of iron oxide; the clay also contains hydrous silicates of aluminum and possibly magnesium. Historically, it was used as an astringent, prescribed against diarrhea, dysentary, hemorrhage, etc. Externally, it was used in strengthening plasters, against dislocations of the joints. ...more on Wikipedia about "Armenian bole"
Bast are the strong fibers in the phloem of a number of dicotyledonous plants, in particular hemp. They conduct synthesized nutrients from the leaves to other parts of the plant. The bast of some plants are commercially important fiber crops. Bast shoes were weaved from bast strips in forest areas of Eastern Europe in old times. ...more on Wikipedia about "Bast (biology)"
Bast fibre (fiber) or skin fibre is fibre collected from the skin or bast surrounding the stem of a plant. These fibres have higher tensile strength than other kinds, and are therefore used for ropes, yarn, paper, and burlap. ...more on Wikipedia about "Bast fibre"
Clay is a generic term for an aggregate of hydrous silicate particles less than 4 μm ( micrometres) in diameter. Clay consists of a variety of phyllosilicate minerals rich in silicon and aluminium oxides and hydroxides which include variable amounts of structural water. Clays are generally formed by the chemical weathering of silicate-bearing rocks by carbonic acid, but some are formed by hydrothermal activity. Clays are distinguished from other small particles present in soils such as silt by their small size, flake or layered shape, affinity for water and high plasticity index. ...more on Wikipedia about "Clay"
Flagstone is a type of flat stone, usually used for paving slabs, but also for making fences or roofing. It may also be used for making memorials or headstones in a cemetery. It also refers to Pennsylvania Bluestone, a stone from northeastern Pennsylvania and the southhern tier of New York. This is a sedimentary stone which is cut or split in layers for walkways and patios. It contains feldspar which gives it the blue color. Flagstone is a sandstone which makes the rock essentially quartz. The material that binds flagstone is usually composed of silica, calcium, or iron oxide. The color of the rock usually comes from the cementing material. Typical colors of flagstone are red, blue, buff, and there are exotic colors like chocolate. It is often used for patios, walkways, steps, fences, housing, and many construction projects. ...more on Wikipedia about "Flagstone"
Rubber is an elastic hydrocarbon polymer which occurs as a milky emulsion (known as latex) in the sap of a number of plants but can also be produced synthetically. ...more on Wikipedia about "Rubber"
The Stevenson Plan was an effort by the British government to stabilize low rubber prices resulting from a glut of rubber following World War I. ...more on Wikipedia about "Stevenson Plan"
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