Not considered toxic - do not breath the dust. A very light transparent green traditionally employed for underpainting flesh. It is very difficult to work with because it does not flow easily. Cobalt Geen Toxic - do not breath the dust. This varies from company to company.
Some varieties solidify in the jar after a day, others resist being ground with water.
Permanent Geen A generic label for green for which each pigment company comes up with its own shade. Some are good, others are totally wrong for tempera. Not considered toxic - do not breath the dust. The modern replacement for Lapiz Lazuli. It is not as dense a blue as Lapiz but it has a very deep rich tone.