shoad
Loose fragments (often of metal ore) mixed with earth.
The earliest mining consisted simply in collecting shoads — a means of gaining a livelihood not yet totally discarded.
Where it comes from
From Middle English shode, schode, from Old English ġescēad (“separation, distinction, discretion, understanding, argument, reason, reckoning, account, statement, accuracy, art, manner, method”), from Proto-Germanic *skaidą (“separation, distinction”), from Proto-Indo-European *skey- (“to cut, divide, separate”). Related to Old English scādan (“to separate, divide, part, make a line of separation between”). More at shed.
Adapted from the Wiktionary entry shoad (CC BY-SA 4.0).