I found this super handy guide about the different types of jewellery clasps from Amy Latta and her blog craftsy.com. Check it out below:
Creating a piece of jewellery involves making many decisions along the way. You have to choose your colours, your style, the size of your piece and more. One thing that often gets overlooked, but is incredibly important, is the type of jewellery clasp you decide to use. There are many options to choose from and some are better suited for certain projects than others.
The spring ring clasp is one of the most common types of clasps you'll see on all kinds of jewellery pieces. As its name suggests, it is a metal ring with a spring mechanism. Just pull back on the small lever and the spring will compress, leaving an opening so you can slide a jump ring or tab inside. Releasing the lever causes the clasp to close automatically, firmly locking the chain in place.
Spring Ring, Lobster, Barrel, Magnetic, Fishhook