Shop › Necklace Matte onyx squares 3/8”, 20” with 18k clasp and/or 18” with 18K clasp Image 1 of 1 Necklace Matte onyx squares 3/8”, 20” with 18k clasp and/or 18” with 18K clasp $1,350.00 $1250.00 for 20” and $995.00 for 18”. Can by attached to each other for long strand. Add To Cart Added! $1250.00 for 20” and $995.00 for 18”. Can by attached to each other for long strand. You Might Also Like South Seas Pearls Strand $4,550.00 Single Leaf Small Charm $90.00 Sold Rutilated Quartz Strand with Andradite Garnets $2,650.00 Sold Twig and Leaf Necklace $4,500.00 Sold Allium III Pin/Pendant $6,250.00 Sold