rocks melt at what temperature range?

Most common crustal rocks start to melt at roughly 600–1,300 °C (about 1,100–2,400 °F), depending on their composition and pressure conditions.

Key temperature range (the “quick scoop”)

Rocks do not melt at one sharp temperature like pure ice; instead they begin to partially melt over a range.

• Typical melting-onset range : about 600 °C to 1,300 °C (1,100–2,400 °F).

• Within this range, solid rock gradually turns into magma (molten rock).

• Different rock types have different exact melting ranges because their minerals and chemistry vary.

Think of it like chocolate with nuts: the “mix” doesn’t all melt at once, and some bits stay solid longer.

Why the range is so wide

Several factors control when rocks melt:

• Mineral composition
  • Rocks richer in quartz and feldspar (more silica‑rich, like many granitic rocks) tend to melt in the lower part of the common range, often starting near 600–800 °C under suitable conditions.

* Rocks rich in iron‑ and magnesium‑bearing minerals (mafic minerals like pyroxene and olivine) usually need **> 1,000 °C** to start melting.

• Pressure
  • Deep in Earth, higher pressure can both raise or lower effective melting behavior depending on the situation, but in many tectonic settings decompression (pressure drop) is what allows already‑hot rock to cross into the melting range.

• Water and other volatiles
  • Adding water can lower the melting point significantly, so some rocks begin to melt at the lower end of the 600–1,300 °C window instead of needing the very highest temperatures.

Everyday angle: rocks vs. familiar heat

To give it some context:

• A typical campfire or wood fire: often peaks near ~800–1,000 °C right in the hottest core, but only briefly and in small zones, so it won’t generally melt solid rock around it.

• Industrial furnaces and kilns can be designed to reach and sustain temperatures above 1,200–1,300 °C, which is in the range where many rock-forming minerals or rock mixtures could begin to melt or soften.

So while the “magic number” isn’t exact, the practical answer to “rocks melt at what temperature range?” is:

Roughly 600–1,300 °C (1,100–2,400 °F), depending heavily on rock type, pressure, and water content.

Information gathered from public forums or data available on the internet and portrayed here.