Clasp - Tension

A tension clasp where the angled "tongue" goes into a receiver. This receiver is embedded into the bead. Photo courtesy of: psychocat1959

Clasp - Hook

Hook clasp. Often used on pearl jewelry. Photo courtesy of: rumor_has_it

Clasp - Barrel - Closed

Called a barrel clasp due to it "barrel" shape. Photo courtesy of: rumor_has_it

Clasp - Barrel - Open

Pieces unscrew to open. Photo courtesy of: rumor_has_it

Clasp - Hook and Chain - Unhooked

Classic vintage clasp where a curved hook hooks over a part of the chain. Photo courtesy of: rumor_has_it

Clasp - Hook and Chain - Hooked

Depending on where you placed the hook would lengthen or shorten the necklace. Photo courtesy of: rumor_has_it

Necklace - Composite Material

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Art Deco necklace with green "stones" that are of a composite of glass and mineral. Photo courtesy of: momtoahsey

Closeup - Front

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Photo courtesy of: momtoahsey

Closeup - Back

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Photo courtesy of: momtoahsey