Gold is a very stable, un-reactive metallic element that occurs naturally in a pure form as nuggets, flakes, wires, and grains. Large pieces are, however, exceptionally rare, and it is more usually found as tiny flakes in river beds or as miniscule flecks on other mineral specimens. It is not only extremely desirable for its material value, but well formed nuggets are also highly sought after by collectors and are worth far more than their direct assay value. Gold's spectacular looks, along with the fact that it does not tarnish and is easy to work, has made it highly prized for the manufacture of religious and ceremonial artifacts as well as for personal adornments since human civilization began. It has a strong metallic luster and a golden yellow streak.
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