They overlap: MINERAL WOOL is the family name for fibres spun from molten mineral raw material — it covers both STONE WOOL (also marketed as ROCK WOOL: spun from volcanic rock, typically basalt; service to ~640 °C, the industrial workhorse) and GLASS WOOL (spun from glass/sand/recycled cullet; lighter, cheaper, ~450 °C limit). So: rock wool = stone wool, and both ARE mineral wool; glass wool is the other branch. In industrial specifications the distinction that matters is the service limit and density — a 'mineral wool' line item should always name which branch and which grade (EN 14303 declared values / ASTM C547 grade). Full datasheets with temperature-dependent conductivity: stone wool (λ 0.036–0.121 W/m·K, to 640 °C) and glass wool (0.033–0.074, to 450 °C) on this hub.
| Term | What it is | Service limit |
|---|---|---|
| Mineral wool | the FAMILY: any fibre spun from molten mineral melt | — |
| Stone wool (= rock wool) | branch: spun from volcanic rock (basalt) | to ~640 °C — the industrial default |
| Glass wool | branch: spun from glass melt | to ~450 °C — the low-temp economic choice |
Datasheets: stone wool (rock wool) · glass wool · head-to-head: computed comparison
