Resin/acrylic jewellery?

I really want to make plastic jewellery and brooches like this one http://www.dollydagger.co.uk/proddetail.asp?prod=GTNCK3REDMTT&cat=81

but i have no idea how. is there any cheap kits i can get, or can anyone tell me what you nees to make them and how you do it?

Resin jewelry is usually thicker than what the picture you provided looks like. It is two liquids that you mix together and then pour into a mold. You could get something close to what the picture shows by purchasing shrink plastic. It comes in sheets and you would draw your shape and cut it out, then heat it according to directions and then paint it with a glossy paint like the enamel meant for models or something like that. Then coat it with clear gloss if you want it very shiny. You have to have your shape cut out exactly how you want it including holes, etc., before you shrink it because it gets too thick and hard to cut. Make sure you cut it larger than you want it to be, it shrinks quite a bit. Be sure to read all the directions. All these things are available at craft stores such as Michael's or Hobby Lobby, or the like if you are in the UK.

Have fun and be creative!