1908 Metropolitan Golf Club May Medal, Enamelled Gold

• Carat - A carat (abbreviated "ct") is a unit of measurement used to describe the weight of a diamond or other gemstone, and separately is a unit of measurement used to describe the weight of precious metals such as gold,.
  
  For gemstones, one carat is equal to 0.2 grams or 200 milligrams. The weight of a diamond is one of the Four Cs (along with cut, colour, and clarity) that are used to determine a diamond's value.
  
  It is important to note that a diamond's weight does not necessarily correspond to its size. A diamond's cut, which affects how well it reflects light, can make a diamond of a lower weight appear larger than a diamond of a higher weight. Additionally, the carat is not the only factor to determine the value of a diamond, other factors such as clarity, colour and cut are important too.
  
  In the gold industry, the purity of gold is measured in carats (abbreviated "ct"), with 24 karats being pure gold and lower carat numbers indicating a lower purity level. So, for example, 18 carat gold is 18/24 or 75% pure gold, and 12 carat gold is 12/24 or 50% pure gold.
• Blackwood - One of the best known and most widely used Australian timbers, blackwood (acacia melanoxylon), is a member of the Acacia (wattle) family and grows in eastern Australia from about Adelaide in South Australia, as far north as Cairns in Queensland.
  
  The largest, straightest and tallest trees come from the wet forest and swamps of north-west Tasmania where it is grown commercially.
  
  Blackwood timber colours range across a wide spectrum, from a very pale honey colour through to a dark chocolate with streaks of red tinge.
  
  The hardwood timber has been commonly used in the production of furniture, flooring, and musical instruments in Australia from the late 19th century. However, the straight grain timber is not the most prized or valuable, that honour falls to blackwood with a wavy, fiddleback pattern, which is used both in the solid and as a veneer. Fiddleback was only used on the finest examples of furniture.

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• golf - memorabilia, badges and medallions 3