You can stack them on a headpin, turn a loop in the top and put them on an earwire.
Another way is to string them on beading thread.
Start with one end strung through a clam or beading tip, string on the chips, put the thread through the bottom of the tip.
To finish I usually string the thread ends through a seed bead, tie a tight knot, add a drop of glue, close the tip and put on an earwire.
Rating
Gemstone chip earrings by: ConnieG
Fire Mountain Gems has tons of ideas. Go to their Gallery of Designs and using the search feature for "earrings chips", you will arrive at this list of about two dozen ideas:
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