"Antique jewelry object group: engagement ring (or anniversary ring) Condition: very good condition Country of origin: Although it does not carry any legible control marks we believe this to be of Belgian origin. Style: Vintage Period: ca. 1930 Material: platinum Extra information: Betrothal rings were used during Roman times, but werent generally revived in the Western world until the 13th century. The first well-documented use of a diamond ring to signify engagement was by the Archduke Maximilian of Austria in imperial court of Vienna in 1477, upon his betrothal to Mary of Burgundy. Before the 20th century, other types of betrothal gifts were common. Before the end of the 19th century, the bride-to-be frequently received a sewing thimble rather than a engagement ring. This practice was particularly common among religious groups that shunned jewelry. Engagement rings didnt become standard in the West until the end of the 19th century, and diamond rings didnt become common until the 1930s. Now, 80% of the women are offered a diamond ring to signify engagement. (from: Wikipedia) Precious stones: amethyst with a weight of 3.82 crt Birthstones: Amethyst is the birthstone (or month stone) for February. Hallmarks: No trace. Dimensions: diameter of top 1,10 cm (0,43 inch) Weight: 4.30 gram (2.76 dwt) Ring size Continental: 48 & 15_ , Size US 4_ , Size UK: I Resizing: Free resizing (only for extreme resizing we have to charge). Reference N: 12158-0076 Copyright photography: Adin, fine antique jewelry "