18k French Firmament Ring, Blue Glass Marcasite Ring in Gold and Silver, Rings of Heaven, XIX Century sapphire_engagement 1880s)Weight: 6

1880s)Weight: 6

visible in photos if you look carefully

Material: Silver (hallmarked)Period: Art Nouveau (1890-1910)Weight: 20

part of a wedding bouquet

but nothing which impacts the elegance of the chain

18k French Firmament Ring, Blue Glass Marcasite Ring in Gold and Silver, Rings of Heaven, XIX Century sapphire_engagement 1880s)Weight: 6A favorite of Marie Antoinette, firmament rings, or 'rings of heaven' were a popular choice in the late 18th and early 19th century. They were often crafted in the oval shield shape, as shown, with a dark blue enamel background decorated with shiny gemstones. The contrast was said to make it look like stars in the sky. The silver setting is encased with marcasites, most of which are the originals with a few replacements. Most of them are in very good