It depends a lot on the kind of black coral you purchased. For
further on Gorgonian black coral, see my articles in the
August, Sept, and Dec 2000 issues of the Lapidary Journal. I have
been working with black coral for over 10 years and also teach
workshops twice a year on how to make jewelry with it at the Boca
Raton Museum of Art School in Boca Raton, FL.
My articles describe the nature of black coral and the two kinds you
will find; antipatharian and gorgonian...the first being deep water,
the second shallow water. They also discuss the nature of each, how
to collect coral, the legal aspects of doing so, how to clean, polish
and form (bend) and how to make various items such as knots, beads,
etc. After reading the articles, if you need more let me
know and I will supply it.
Cheers from Don at The Charles Belle Studio in SOFL where simple
elegance IS fine jewelry! email@example.com