Commodity money coins. Commodity money Commodity money is money whose value comes from a commodity of which it is made. Commodity money consists of objects that have value in themselves (intrinsic value) as well as value in their use as money. Examples of commodities that have been used as mediums of exchange include gold, silver, copper, salt, peppercorns, tea, large stones (such as Rai stones), decorated belts, shells, alcohol, cigarettes, cannabis, silk, candy, nails, cocoa beans, cowries and barley. These items were sometimes used in a metric of perceived value in conjunction to one another, in various commodity valuation or price system
Buoyancy compensator (diving) object is picked up. Generally, the diver has little control of the position of the center of buoyancy in the BC during a dive, only the amount of buoyancy. However the diver can change the centre of gravity by adjustment of the equipment setup, which includes its configuration and position of weights, which ultimately influence where the effective BC lift is positioned relative to the Center of Gravity. Traditionally, weight belts or weight systems are worn with the weights on, or close to, the waist and are arranged with a quick release mechanism to allow them to be quickly jettisoned