I think it's a nugget.
Small pieces of gold are called gold nuggets. These are nuggets can be found in rivers, streams, or underground and vary in size.
Small long pieces of gold are typically known as gold bars or gold ingots. They are typically used as a form of investment or as a store of value due to the high value of gold.
Teddy
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it was first mined by placer mining method of washing the dirt from around the small pieces of gold found in creeks.
tesserae
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Confetti
Mining for gold was very hard work. This was because gold usually came in very small pieces and was hard to extract from the rock it was imbedded in .