It would be called soil. It is dark brown with speckles sort of like qrtz.
It would be in the powders section.
plnt grows on it.
When you put watr on it, it turns into goo.
Does not melt or combust (not sure).
When it turns into goo, the ctype is soil. If you heat that goo to 100C, it turns into soil again.
As a joke, add FOOF (Dioxygen difluoride). It sets everything on fire and is orange.
Why soil would be usefull and why it's worth to add this?
You can put sand and change its colour using BIZR machine.
How does plant grows on it? When PLNT touches soil, it will turn PLNT into vine?
I don't see a reason why SOIL + WATR = GOO. GOO is some kind of balistic gel. Mixing soil with water should give us mud (mud should look like a gel?) or soil should get darker.
Why soil can't be melted? Wet soil (or mud) should release water like sponge when heated.
Plant spreads like vine (when it is on wood) on soil. Soil and water make mud. MUD is dark brown and viscous like gel. When you heat mud, it releases water and turns into soil. When you heat soil to 450C, it combusts. Soil could be usefull for making plnt farms or realistic gardens or landscaping. It would take 50 particles of watr to turn a soil particle into a mud particle. Plus, soil acts like spng when adding water.
I think 50 particles is too high. 10 is enough to turn water into mud. Also, there's part about soil from my suggestions list: