Red garnet
Red garnet covers gem-grade almandine and pyrope as well as hard industrial grades. We grade carefully because the two markets value very different things.
In short
Red garnet is dug from metamorphic rock or gravels, then graded either as a gemstone or as an industrial abrasive.
- Formula
- Fe₃Al₂(SiO₄)₃ (almandine)
- Density
- 3.6–4.3 g/cm³
- Hardness
- 6.5–7.5 Mohs
- Priced in
- Per carat (gem) or per tonne (industrial)
What it is
Garnets are a family of silicate minerals that share one crystal structure. The red varieties, almandine and pyrope, are coloured by iron and magnesium. Gem grades are cut for jewellery; hard, angular grains are used as abrasives for waterjet cutting and blasting.
Supplied as
- Gem rough
- Industrial bulk
Who buys it
- Jewellery
- Waterjet cutting and abrasive blasting
- Water filtration media
What we check before we sell
- 01Gem or industrial grade classification
- 02Treatment disclosure (gem grade)
- 03Origin documentation
From raw to refined
How red garnet becomesjewellery and abrasives.
Follow red garnet through 7 stages, from the moment it leaves the ground to the finished piece. Keep scrolling: each step has its own photograph or film.
Find · Metamorphic rock
Garnet in schist
Red garnets grow inside metamorphic rocks such as schist and gneiss when they are heated and squeezed deep underground.
Next commodity
Green garnet