Lava

Properties
Section	Liquids
Spawn temperature	1522°C
Heat Conductivity	24%
Relative weight	45
Gravity	0.15
Acid dissolve rate	0.2%
Flammability	0
State	Liquid
Transitions
Low temperature	transition occurs below 3421.85°C
Misc properties
Source code

Solidifies to molten material under the melting temperature of the material.

LAVA is usually displayed as "Molten AAAA" in the HUD, where AAAA is the material which has melted into LAVA. Even though it doesn't mention LAVA in the HUD, it is still LAVA.

The following materials can become molten at high enough temperatures:

Most electronics (mostly wires melt, these don't melt: BTRY, INST, and WWLD), Most powders (some that don't melt: SNOW, BREL, ANAR, GRAV, FRZZ, BCOL, FSEP, YEST, and DUST), Glass, Breakable metal.

Lava, when spawned (such as when you draw lava on the screen, or with CLNE) cools into STNE. If you change the ctype with PROP or the console, you can come out with any type of LAVA like molten STKM, molten WATR, or molten FIRE. This is glitchy though, don't expect this behavior to always work in the future.