This is a gorgeous 14k yellow gold and labradorite pin set with a small, full cut diamond by Helga Narsakka for Kaunis Koru, Finland, c. 1982. The pin has a custom made removable finding that slides on the pinstem so it can also be worn as a pendant. The pin measures 1 1/4" x 1" and is in excellent condition. The stone has wonderful labradorescence showing lustrous blue metallic hues when the light catches it - unfortunately this does not show up in the photos. It is fully signed with HN (Helga Narsakka), Finland mark, 585 (i.e. 14k gold), E8 (date mark 1982) and the Kaunis Koru mark.
Kaunis Koru was founded in 1954 and became a leader in modernist jewelry. It was later acquired by Kalevala.