Orichalcum is almost twice the worth of copper .
Their name for brass was orichalcum , also spelled aurichalcum ( echoing the word for a gold coin , aureus ) , meaning 'gold-copper ' , because of its shiny , gold-like appearance when the coins were newly struck ( see , for example Pliny the Elder in his Natural History Book 34.4 ) .Orichalcum was considered , by weight , to be about double the value of copper .
Sestertius