Amethyst Halo CharmAn 18. 510. 3mm 925 sterling silver charm with an oval amethyst at 75mm surrounded by a white CZ halo the Amethyst Halo is the most elaborate amethyst charm in the collection. Five stones total amethyst centre, four white CZ surround in a halo arrangement that frames the purple stone in white light. At 1. 8g, more substantial than most charms. The halo setting creates the impression of a full pendant necklace in charm scale. The amethyst charm for