Electrum coin (ep) is an alloy of silver and gold. Coins made from electrum are worth one-half of coins made from gold.
In addition, unusual coins made of other precious metals sometimes appear in treasure hoards. The electrum piece (ep) and the platinum piece (pp) originate from fallen empires and lost kingdoms, and they sometimes arouse suspicion and skepticism when used in transactions. An electrum piece is worth five silver pieces, and a platinum piece is worth ten gold pieces.
2 electrum pieces (ep) = 1 gold piece (gp). Each coin weights about 1/3 of an ounce. Fifty coins always weigh a pound, no matter the type of coin. (Lore: this was set to standardize trade by merchants and guilds.
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