Could these be Margaret Craver pieces?

by CJ McNAUGHTON
(IOWA)

Can anyone give me info on these dress clips? At first I thought they may be suffrage related clips given the green and violet,but they look to be from the 30's.The only marking is a 3 petal flower or clover with a "C" in the center.Looks the same as another posted brooch attributed to Margaret Craver.