This ocean jasper is heavily agatized. Agate is a translucent to semitransparent chalcedony. If you have a piece that is semitransparent you will be able to hold a very thin piece up and see distorted or foggy images through it. If you hold a translucent piece up to a source of light you will see a small amount of light passing through the thin edges.
If the dissolved mineral composition of the silica-rich water changes over time, impurities can be incorporated into the gel and into the microcrystalline quartz. These impurities can alter the color of the microcrystalline quartz. Crystallization of non-silica materials is often what forms the plumes, dendrites, or mossy structures that are often seen in translucent agate.