can molten lava melt a diamond???

Answer 1

Diamonds crystallize from hot carbon-rich fluids. This crystallization requires tremendous heat and pressure—1000 to 1200°C (1800 to 2200°F) of heat and 50 kilobars of pressure. Lava flows at the same temperatures. Somehow I doubt that lava will melt a diamond.

Answer 2

As has been said, diamond forms under high pressure. When heated at lower pressure in the absence of oxygen, it will turn into graphite or amorphous carbon. But if you just dropped a diamond into some lava, it would burn.

I don't know whether it would become a liquid at core-of-the-sun pressure and temperature, but you can't automatically assume it would: at appropriate temperature and pressure, various substances become supercritical fluids rather than gas or liquid. There's a distinction between gas or liquid at everyday pressures, but as you increase the pressure a liquid will not only boil at a higher temperature but also have a lower heat of vaporization. Eventually, the heat of vaporization reaches zero and the distinction disappears. I suspect that diamond cannot melt in the sense of turning into a liquid. Or maybe it would turn to graphite before fluid all the way up.

Answer 3

Diamond requires a temperature of 3820 K (3547 °C / 6420 °F) to melt so therefore lava generally between to 700°C and 1200°C would be unable to melt a Daimond.

Answer 4

No. By the time magma becomes lava it begins to cool quickly and it is nowhere near the temps needed to melt diamonds, nor is near surface magma. Diamonds are formed under intense heat AND pressure in the deep, deep crust.

Answer 5

Diamonds are formed at ~90 km depth in the mantle where the pressure and temperature are great enough to construct the crystal lattice. They are then transported to the surface in liquid magma and can be found in old volcanic vents called kimberlite pipes within the cooled volcanic rock. As these pipes erode diamonds are transported by rivers to where they are found.
Diamond are not melted by hot magma but as they are pure carbon and unstable at the Earths surface they will oxidise/burn to CO2 at high temperatures.

Answer 6

Generally heat can melt everything
diamond is created form high pressure and high temperature
in the core where everything is a molten . . . yes diamond can be melted

in a some place other than the core or sun. . .. no

Answer 7

Watch the film The Core

Answer 8

no, diamonds come from the core where this sort of thing has gone on for millions of yrs. thats how they got here, and if you want to see this just drop it in.

Answer 9

can you send me the diamonds so i can test your theory?

Answer 10

No.
Diamonds are created by Magma under pressure and lava
is magma released from same pressure.