A Ring Set

White gold and diamond ring set
By EraGem

A ring set is a group of ring which are made to be worn and fit together, the most common set being an engagement and wedding ring set.

Domed Ring

Domed ring
by Mondevio
 cast 18 Karat gold 

A domed ring is ring with a convex shape, it shape tappers from the top to the bottom (getting less domed at the bottom of the ring), it is often tapered from the side view as well.

Eternity Ring

A set of claw set eternity bands
by Langerman diamonds
18 karat white gold and diamonds

An eternity ring is a ring which is encircled with identically sized stones, also known as a 'full eternity' it symbolic meaning is 'never ending love. Common setting for and eternity ring are claw, bead and channel.

Bands

Tungsten gold band
By RnBstyles

A band is ring consisting of a circle of  metal and worn on the finger, is can have stone set in it bur is usually simple in design with a ribbed, half-round or flat shape.

Cocktail Ring

Vintage Cocktail ring
by EraGem
Aquamarine and 14 Karat gold

A cocktail ring is a oversize and dramatic ring, which gets it name form the fashion tends of the 1930's. During this time prohibition meant that cocktail parties were illegal and when these gatherings were held these often expensive rings were worn to flaunt the wear's status.

Signet Ring

Relief engraved signet ring
By Sam Alfano

A signet ring typically has a design cut or engraved on its flat top, this design can be used to make an impression in wax and would be an initial or crest. Historically the ring was used as an official seal to mark letters and official documents

Dress Ring

Gold and diamond Dress ring
by Sterlé from Morelle Davidson.  
circa 1970

A dress rings would be a ring that is not an engagement or wedding ring, worn only for occasions of on a semi-regular basis. As the word implies the  dress ring is worn for dressing-up.

Cluster Ring

Antique Diamond Cluster Ring
by Jewelry Atelier
18k yellow gold and platinum, .88 carat center Old European cut diamond and 1 carat of accent diamonds

A cluster setting contains a group of stones, traditionally a single large stone surrounded by smaller stones.