This black stone that I found on the beach is such the perfect shape for a pendant!  And I hand-knotted the necklace, with mostly black beads- Onyx, Snowflake Obsidian, Black Agate, Black Tourmaline- but also added in some color with several colors of Garnets, Labradorite, Amazonite, Aquamarine, Kyanite, Sapphire, Sodalite, Emerald, Ocean Jasper, Jade, and Prehnite. It measures 30”.