I'm 99% positive that this ring is Jet and possibly whitby jet. A small black dome ring with the wood showing through from the inside of the dome. The exposed wood looks very much like the raw jet that I've seen.
I'd love to hear some other opinions on this....and obviously, I'd love to hear that it is Jet. To compare the wood on the ring to the raw wood, go to ...and scroll to the very bottom of the page
http://www.morninggloryjewelry.com/victorian-jet-jewelry-aid-31.html
Tags: identification, jet, reference, ring, victorian
here is a site that gives "tests"

Permalink Reply by WhimsicalVintage on December 2, 2012 at 5:59am Great link Valerie, thank you so much!
Permalink Reply by Metro Retro Vintage on December 22, 2012 at 7:52pm I have a few rings like these (must dig them out now) -- with what looks like wood (even a coconut 'wood) with silver inlay.
I don't believe that they're jet, simply because of their shape and jet's fragility but definitely looking into some more. Could be carved horn to imitate tortoise, but that's a guess.

Permalink Reply by WhimsicalVintage on December 23, 2012 at 9:24am Here's another link from Morning Glory Antiques that I found very interesting and helpful, she also has a book listed from a woman in England who's an expert on jet ("Jet" by Helen Muller) at $12.50, I think this book is well worth the investment.
http://www.morninggloryjewelry.com/victorian-jet-jewelry-aid-31.html
(scroll down about 1/2 of the way for the differences in Jet, Bog Oak, Vulcanite and Horn but the whole page is a great read)...the link for the book is at the bottom of the page
The feel of the wood on the inside was definitely not coconut and matched the grain in pics on the Morning Glory site, referenced above and it passed all of the tests on the site that Valerie referenced...but that being said, until one is really an expert it's hard to say for certain. Most of the items that I purchased with this ring were from the 1890's to the 1930s, so I factor that in as well.
Permalink Reply by Metro Retro Vintage on December 23, 2012 at 1:37pm If it has a grain, then it's likely to be more of a Bog Oak, than it would a jet. I don't believe that it is bog oak, however, it is a possibility.
One would be hard pressed to find any rings made of jet, especially when it includes the shank.
Permalink Reply by Metro Retro Vintage on December 24, 2012 at 6:31pm Another possibility is black coral.

Permalink Reply by Antiques du Jour on January 2, 2013 at 4:27pm Wonderfully imformative discussion. I don't think it is black coral because it would be black completely through.
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