Large Native American Labradorite Sterling Silver Pendant

This large, teardrop, labradorite, Native American, sterling silver pendant is in great gently used condition and catches beautiful blue hues. Total length of pendant and top loop is 2 1/2" long. Labradorite itself is approx. 2" long! Unisex. Can hold a thick chain. Not marked sterling, but purchased as such and passes ice test. Hallmarked "HB"?