Karat Fine Vintage Jewellery is an online jewellery store offering a curated range of vintage and contemporary-style pieces. Its catalogue includes rings, signet rings, wedding bands, earrings, necklaces, pendants, chains, bracelets and brooches, alongside gift cards and jewellery selected for special occasions. Rings form a particularly broad part of the collection, with designs spanning vintage, minimalist, retro, Art Deco and other styles.

The products are made from materials including yellow, white and rose gold, platinum and silver, in a range of stated purities. Many pieces feature gemstones: the selection includes diamonds, sapphires, opals, topaz, garnets, amethysts, pearls, rubies and other stones. Individual listings provide details such as metal, stone and ring size, helping shoppers browse and compare items.

Customers can shop through the website, which offers product filters, a wishlist and gift options. Karat also provides a blog, frequently asked questions and customer-service information, with contact available by phone, WhatsApp and email. The site includes information about delivery, payments, returns and complaints, as well as a newsletter for subscribers.