Shop › Blackjack Necklace Image 1 of 2 Image 2 of 2 Blackjack Necklace $399.00 Blackjack necklace, handmade by Acacia Otteson. Made with hypoallergenic materials. Add To Cart Added! Blackjack necklace, handmade by Acacia Otteson. Made with hypoallergenic materials.