These three sets of vintage earrings all have interesting hooks/clasps.

Set one is a tiny black stone - likely onyx set in silver with a clasp. Less than a 1/2 in size it is a dainty little day time earring or could be worn by a child. 

Set two is square stone setting with what appears to be bezels garnets and vintage clasp. 

Set three also appears to be onyx that is one inch long and swivels. It is in a timeless setting of silver and has a unique clasp.

All three are small in size, easy to wear and most definitely vintage. 

All these earrings need are a polishing cloth and a pair of ears to home them!