Dating spring ring clasps
As its name implies, this jewelry fastener is circular, or ring-shaped, with a small nub poking out of it.
Jewelry from this period is quite rare and it will be handmade, typically with 18k yellow gold and silver.
Lobster clasps are very strong since the ovoid shape means that the strain is never on the delicate part that opens.
The only disadvantage to this style of closure is that it can be difficult to operate with one hand.
Also known as "trigger" clasps, lobster clasps are some of the most common options for closing necklaces and chains.
These closures are typically ovals, but they can be other shapes as well.