The first metal ring ever made was likely a signet ring. 

Before there was even a written language, rulers (who could afford them) property owners and officials likely used a signet ring to show their official family seal on tablets or parchment.

Signets with a Family Crest often incorporate an animal head or symbolic object.

Please inquire about a custom design.   I would also provide resources for finding your family heraldry.

The Maple Leaf Signet in 14K Yellow Gold and Sterling Silver. As shown ~ $225.00 In all 14K Yellow or White Gold ~ $725.00 In all Sterling Silver $145 Prices in CND.

Models of the Simple Triskele Signets in Sizes 4-6 (note the red enamel)

As above ~ $145.00 CND.

In all 14K Yellow or White Gold ~ $325.00 CND

Below is a Custom Family Crest.  It shows the Doherty Family crest.  Custom rings like this are $275 to order in Silver and $175 for each additional ring after the first.

Other items made with Celtic Tree of Life themes are:

The Tree Triskele Ring

The Celtic Tree of Life Ring

and my Celtic Tree of Life Pendant

The Medieval Tree of Life Ring

A Sterling Silver Ring with a 14K Gold Tree of Life Signet from the Abington Sword an Anglo-Saxon artifact from England.  Note the abstract Greenman face.

A custom Star Loveknot or Pentacle Signet ring in Sterling Silver
 

A Custom Irish Celtic Harp Signet Ring in Sterling Silver.

A Custom Signet Ring, with a motif from Global Warranty set with .38cts of Diamonds.