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Step 3: Seashell Pendant

Trim the excess off with scissors. Use files and rotary attachments to further shape the piece.

For the jump ring fashion a loop out of the same plastic and super glue it to the back of the pendant. Cotton cord makes for a good necklace.
 
I could be wrong, but wouldn't it be easier to trim it to shape before melting? Like a shrinky dink? This way you wouldn't necessarily need a dremel tool for smoothing