Offered here is a very nice example of Dalmation Jasper, in a triangle shape. This comes with the copper bail and the 18" necklace.
Dalmation Jasper is not really a true jasper, although it is popularly known as such. Like K2 Jasper, it's actually an igneous rock. The black material is the mineral arfvedsonite, an amphibole similar to hornblende. The white material is a mixture of the mineral albite, a plagioclase feldspar, and lesser amounts of quartz. Striking, nonetheless!
(As always, if you don't like the choice of bail or necklace, just contact me and we can make changes.)