Black Jasper aka Black stone . this is a stone with a highly protective energy and healing energy. Black Jasper is said to bring good luck to the bearer in a fight,in any form. It is also used for protection against lightning. Black jasper is said to have energies of determining value; It was used as a touchstone for determining gold content in allows for thousands of years. In addition it has the other properties of jasper. Physically, black jasper is said to be helpful for relieving pain, stomach ailments, foot problems, and hip dysplagia
     
it's common for blackstone to be a name for any black colored stone wether it's natural or dyed. That's the problem with a lot of trade names. it adds a lot of confusion. but usually blackstone is applied to black jasper. but just because it's labeled as blackstone doesn't mean it's black jasper.

but unfortunately that is not limited to just this.