Cluster earrings were very common in the 18th Century and Garnet was a very popular color!  These are made with Swarovski crystals in a deep, sparkling red!  

Gold-plated brass!

Available in clear crystal here: https://www.damesalamode.com/products/18th-century-paste-glass-earrings-reproduction-rococco-earrings

See more Garnets here: https://www.damesalamode.com/search?page=1&q=garnet&type=product