iKandies has found that purchasing metals from a company like Rio Grande who specializes in this type of product results in higher quality and better prices. Many online bead sites specialize in large amounts and varieties of gemstones, crystals, glass, and findings, and offer sheet metal and copper wire in smaller amounts ( 3" x 3" sheets or 10 to 20' wire coils). Small pieces of metal or lengths of wire are fine for the occasional metal accent piece but these items come at a cost. The price break you get buying in larger amounts really pays off.
And if you're really interested in getting a "price break" on copper, hunt around for unused or left over copper wire from building sites. The next photo shows the copper wire (about 26 gauge) iKandies inherited from a do-it-yourself heating and air conditioning project done by a relative. We have used this wire for many, many projects, including the wire wrapped Rivoli pendant necklace shown in the picture.
Copper sheet and wire are easy to work with and make beautiful jewelry pieces. Pure copper can be textured, painted, enameled, oxidized, treated with a patina or torch fired with gorgeous colorful results. If you haven't worked with copper, branch out and try it for your next project. You'll be pleasantly surprised with the results.