a small, black opal

This smooth, round gemstone appears to be black at first glance, but as the light catches it, small specks of crimson, turqoise, and amber glimmer across the surface. The gem is small, about the size of an acorn, but with a solid feel to it.

It is a small, black opal.
It weighs about an ounce.

You identify a small, black opal.
It weighs eleven drams, and it is worth about ten lauren.
Its keywords are opal, black, gem, and jewel.
When embedded, it can be used to disengage the user from combat.