CHAIN LINK TYPES

There are a near-infinite amount of chain link types.  Below are photos of many different popular styles.
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Click to enlarge each image.

Photos courtesy of Scott Papper, GIA GG, AJP, CM (NAJA), Global Gemology & Appraisals
ANCHOR LINK
Flat anchor / mariner link chain in 14K gold
Flat Anchor Link
BAR LINK
Bar link chain in 18K white gold
Bar Link
BOX LINK
Box link chain in 18K gold
Box Link
BYZANTINE LINK
Byzantine link chain in 14K gold
Byzantine Link
CUBAN LINK
Heavy Miami Cuban link chain in 14K gold
Miami Cuban Link
CURB LINK
Flat curb link chain in 14K gold
Flat Curb Link
ELONGATED LINK
Elongated link chain in 14K gold
Elongated Link
FIGARO LINK
Figaro link chain in 14K gold
Figaro Link
FISHING SWIVEL LINK
Fishing swivel link chain in solid 14K gold
Fishing Swivel Link
FOXTAIL LINK
Foxtail link chain in 14K gold
Foxtail Link
GUCCI LINK
Puff Gucci link / mariner link chain in 14K gold
Puff Gucci Link
MARINER LINK
Flat anchor / mariner link chain in 14K gold
Flat Mariner Link
OVAL LINK
Oval link chain in 18K white gold
Oval Link
POPCORN LINK
Popcorn link chain (a.k.a. caviar link)
Popcorn Link
ROLO LINK
Rolo link chain in 14K gold
Rolo Link
ROPE LINK
Rope link chain in 14K gold
Rope Link
SERPENTINE LINK
Serpentine link chain in 14K gold
Serpentine Link