These Blue Fluorite Teardrops could be considered cabachons. There are 23 on hand so these will be a random pull. The general dimension for these teardrops (only measured one so the is a very basic sizing.) 19 x 27 mm with a thickness of 9 mm. Weight is 7-10 grams. 
 
Blue Fluorite has a translucent quality and occurs in all shades of blue from light to deep blue. It is often banned or has other material captured within the specimen.