Weigh the cost of building versus the return on your investment in the balance and you may find a granny flat can offer a great return for years to come and can add value to your home should you decide to sell. *Cost and prices in this article are indicative and should only be used as a guide.
The needles are generally made of a heat-treatable stainless steel or carbon steel. To prevent corrosion, many are nickel plated. Depending on the style of device used, the main body of the tube can be made of plastic, glass, or both.
Without minerals you could not put pen to paper. The writing tips of pens are made with a strong metal called tungsten which comes from wolframite and scheelite ores. Think about the properties of tungsten: Strong; Rigid; Impermeable; You can see why we make pen nibs from tungsten. Paper is usually made of wood pulp mixed with minerals like clays, mica, talc and baryte. Lead pencils do not contain lead. The 'lead' is made of a mixture of clay and a mineral called graphite - a form of carbon. Think about the properties of graphite: Soft ; Easily powdered ; Opaque (not see-through) You can see why we make pencils from graphite.