cadmium
cadmium copper

copper
a few coppers

Copper Pheasant
Syrmaticus soemmerringii

Copper Seedeater
Sporophila bouvreuil

Copper Sunbird
Cinnyris cupreus

copper-bottomed
com fundo de cobre

copper-nickel
cuproníquel

Copper-rumped Hummingbird
Saucerottia tobaci

Copper-tailed Hummingbird
Saucerottia cupreicauda

Copper-tailed Starling
Hylopsar cupreocauda

Copper-throated Sunbird
Leptocoma calcostetha

copper-top
ruivo

Cu
copper

engraving
engraving on copper

hammered
hammered copper

manganese
manganese copper

muriate
muriate of copper

oxidized
oxidized copper

pyrites
copper pyrites

refined
refined copper

sheathing
sheathing copper

silver-plated
silver-plated copper

specimen
specimens of copper ore

substance
copper is a hard substance

sulphate
sulphate of copper

sulphide
...sulphide of copper / sulphide of iron / sulphide of silver

sulphuret
...sulphuret of copper / sulphuret of mercury

tough
tough copper

vitriol
blue vitriol / copper vitriol

yellow
yellow copper