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 Golden South Sea Pearl Strand $7,500.00 Sold Matte Labradorite Strand $1,995.00 Sold Cobalto Calcite Heart Pin/Pendant $4,950.00 Sold Long Leaf Charm $250.00 Sold Moldavite and Paraiba Tourmaline Pin/Pendant $5,950.00 Sold