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Message:: [QUOTE="physics-fan3.14, post: 4546916, member: 19165"]For many regions of the world, the "hoes" or "axes" or "knives" that were traded were originally intended to be hoes and axes and knives. They were traded because they were valuable tools. Once traded, they were used to clear a field or cut a tree. That's the reason they had value. As trade progressed, the hoe or axe took on a more representational form and lost its usefullness - it became a unit of currency. In contrast, the original Lydian coins had only a single purpose - as a unit of value. Their entire reason for existence was currency and trade. To some collectors there is a distinction. To some collectors, any unit or item that was used to facilitate commerce could be considered a "coin". Some collectors prefer the standard round-ish metal piece stamped by an issuing governance... some collectors enjoy the opposite.[/QUOTE]