Titled 'Flotique', the art deco-influenced collection is influenced by the art style of her second album Ceremonials.
Prices for Welch's six-piece capsule collection start at £20 for a birdcage-shaped ring made from black rhodium-plated polished brass, with other pieces in the range costing between £30 and £50.
The jewellery is available to purchase now via flotique.com.
Welch was recently reported to have joined in with a rendition of 'You've Got the Love' when she was recognised by fans while travelling on the London Underground.
Florence + the Machine are in contention for two Grammy Awards - 'Best Pop Duo/Group Performance' and 'Best Pop Vocal Album' - at this weekend's ceremony in Los Angeles.
Watch the music video for 'Breaking Down' by Florence + the Machine below: