Psilomelane Dendrite, which is also known by its trade name “leaf jasper”, is a semi-precious gemstone that is made up of manganese oxide. It is highly desired for its distinctive dendritic patterns which are very intricate, and because no two Psilomelane Dendrite gemstones possess the same dendritic pattern, the Psilomelane Dendrite jewelry is always considered one-of-a-kind.