
AJF is an organization highly involved in promoting and supporting the contemporary art jewelry genre. For more pictures and to view the full entry, please go to the Art Jewelry Forum blog.

AJF is an organization highly involved in promoting and supporting the contemporary art jewelry genre. For more pictures and to view the full entry, please go to the Art Jewelry Forum blog.
I have run across more than one online source, such as the Encyclopedia Britannica, that suggests a carbuncle is specifically an almandine garnet, but this is its contemporary definition. General consensus of its ancient usage was any red gem cabochon. The below picture is from minerals.net and Gemhut.
It does look as though it might need a medicated salve, doesn't it? As far as gems go, garnet cabochons are still reasonably priced. I got my current stash from a Dallas gem show, but Fire Mountain Gems has a nice supply. I recently used a couple in my Dollar Earrings I set and was pleased with the results. They look almost black in the picture, but in reality are a deep red.
After further research, I don’t know if I entirely agree with this definition. The direct translation from French means “in slavery.” 
The description also give a little history:



Roughly translated from the blog “The collar of slavery, in gold, was in the nineteenth century, the greatest gift a husband can give to his young wife, the Empire or the Restoration.
It usually consists of several chains in festoons, generally has three connected ovals, rectangular, glazed or not.”

The term could certainly have been used for any manner of necklaces over the years evolving with fashion trends. In fact, contemporary examples tend to be of the fetish persuasion.
Since words have different meanings depending on period and region, the example shown in class may very well be en eslavage but I believe the other examples above illustrate a more common usage of the term








