Description Vintage Black Onyx Semi Precious Stone Chunk Bead Necklace With Silver-Tone Spacers, And A Silver-Tone Lobster Claw Clasp With An Adjustment Chain. Excellent Vintage Condition: Measures 15.25″ Long With Adjustable 2.25″ Silver Tone Chain. Black Onyx is a popular and powerful gemstone. Onyx beads have become very collectible as many believe they have mystical qualities – a powerful protection stone, Black Onyx absorbs and transforms negative energy, and helps to prevent the drain of personal energy. This Vintage Black Onyx Necklace Is Sold By Vintage Pins Brooches, www.vintagepinsbrooches.com, Ladies Designer Jewelry, www.ladiesdesignerjewelry.com All Sales Are Final.