The type of Damascus steel is called Damasteel that I use to makes these rings. It comes from a Swedish company called Damasteel. Click on 'here' then click on KNOWLEDGE & INSPIRATION ,at the top, then click on INSPIRATION to see what they do. My ring that I made for my wife is featured there. It is made of 2 different stainless steels that will not rust or tarnish.
Surgical grade stainless steel (SAE grade 316) that will not rust or tarnish. This material is also nickel free
Aircraft grade 5 Ti6A14v titanium. This material should not cause an allergenic reaction and it is also nickel free, my wife has allergic reactions to jewelry containing nickel.
The Opal I use is a synthetic lab-made material that consists of Silica and Polymer rather than hydrated silica (natural opal). The polymer stabilizes our opal which in turn makes it easier to use. The Opal I use does not fall victim to color fading and is resistant to chemicals such as acetone and alcohol.