Set of 3 vintage shell and seed necklaces in natural white, tan & brown

Set of 3 vintage shell and seed necklaces: - Vintage mini conch and cowrie shell necklace in white, tan and brown. 17" long. - Vintage watermelon seed necklace with turquoise color spacer beads. 12-1/2" long. - Vintage koa seed necklace. Dark brown. 28" long. Can be doubled. Looks like one section is missing a few seeds (shown in last photo). That area can easily be worn to the back of the neck. Otherwise very nice vintage condition.