Can lava melt a diamond?

No, you you can set it on fire. The diamond melting point is listed as 3525~3550C at high pressure. Temperatures of most lavas clock in at 700~1300C. But a diamond's ignition temperature in air is around 700C. read more

The melting point of Diamond at about 100,000 atm is 4200 K, which is much higher than the temperature of lava. So, it is impossible for lava to melt a diamond. But the twist is that at atmospheric pressure, it is almost impossible to melt diamond as its burning point is 900 °C (1173 K). read more

Best Answer: That lava would have to be hotter then the melting point of diamond. And it's melting point is 3550°C. That would be some pretty hot lava. Lava is usually much cooler, between 600 and 1500°C. read more

Assuming you mean melt from any natural temperature of Earth lava, there is metal that the evidence indicates can’t melt from any natural temperature of Earth lava. Tungsten, iron, nickel, cobalt, beryllium, platinum, and titanium all seem to have melting points above the hottest Earth lava. read more