11.18 CT OVAL AMETHYST RING BY MARCUS & CO: 1928 Ca platinum setting by Marcus & Co features a 10 CT oval mixed cut amethyst beautifully accented by 10 fancy French cut baguettes approx .50 CTW. Size 7.5. 8.25 grams. Bruising marks under girdle line. Sold with current Florida Diamond Appraisers GIA graduates appraisal $3850.