Amethyst Mist CharmA marquise amethyst at 84mm with a white CZ accent in a 17. 56. 5mm 925 sterling silver setting the Amethyst Mist is a narrower, longer marquise charm than the standard variant. The elongated proportions create a more linear, almost spike like form when suspended. At 0. 66g, almost weightless. The mist name reflects the lighter, more ethereal quality of the proportions: same amethyst colour, slightly more architectural form. For those who collect