This is an electronically tested 18kt yellow gold amethyst with diamond accent pendant/enhancer. The pear-shaped amethyst measures approximately 20mm x 13mm x 9mm for approximately a 10 carat stone! The amethyst is offset by approximately .10 carats of round, brilliant cut diamonds. The enhancer is approximately 1.5" long and 3/4" wide. The bail on this pendant/enhancer is nearly 5mm so it would easily work on a 4mm chain. The bail is hinged, making it an enhancer for bead necklaces. This pendant weighs 13 grams (8.4dwt). This is a preowned, estate item.