Volume is the physical size of an object. One method for finding volume involves using a geometric method that incorporates an appropriate formula or formulas. For example, finding the average length of a side of a square block and then cubing that number. Another method involves submerging an item in liquid, noting the change in level of the liquid, wherein each of the two levels is a different volume. The volume of the item itself is the difference between these two measurements.

Smelting gold dust into larger particles likely improves the practicality of either of the two above methods. For estimating value by eye, I’ve categorized four distinct volumes I think are visually-familiar. They are: the width of a human hair, thickness of a fingernail, width of a thread, and something I think can be called sand-sized (about ½ millimeter wide).

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