Over the years I've created so many paperweights with vintage and
antique costume jewelry. I look for broken pieces, especially brooches
with missing or badly bent pins. These can often be purchased at flea
markets and antique sales for just a few dollars. You can also find
beautiful reproductions at most major craft stores.
The collage for this paperweight was made with reproduction milk caps.
You can use vintage pieces if you wish. Just check to make sure they're
not rare and valuable before you start cutting and applying glue.
(You'd be surprised how much an old milk cap can be worth for its
artwork or the particular town it's from.)