The assorted unnamed cabochons of size 30mm x 22mm may be any type of jasper, agate, etc. that is available when ordering. The cabochons will all have a good polish and be calibrated but will be unnamed. Over the years we have purchased lots of hand finished cabochons which were unnamed, but still worthy of being made into beautiful jewelry. If you have a number of cabs ordered, you might recognize the material in the cab.