This is a natural purple/red stripes Onyx Agate pendant necklace with .925 sterling silver pendant bail and .925 sterling silver 18" 1mm necklace snake chain. The gemstone shape is marquise, size is 55x29x7mm (height x width x depth) and weight is 75.90cts. Both the sterling silver pendant bail and necklace chain are stamped 925.
The standard necklace chain length is 18". If you would prefer a 20" chain, send me a note when placing your order and I will substitute a 20" 1mm necklace snake at no additional charge while supplies last.