Monthly Tech-Tip from Tony Hansen SignUp

No tracking! No ads!

1-9 | A | B | C | D | E | F | Frits | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Magnetite Granular


Oxide Analysis Formula
Fe2O3 66.17% 1.00
FeO 33.83% 1.00
Oxide Weight 241.80
Formula Weight 241.80


It is not to be confused with brown Fe3O4 mixed ferrous-ferric iron oxide. Unlike the much softer black and red iron oxide, this material is useful in granular form to introduce specking into bodies and glazes. Many other materials are available as speckling agents.

Related Information


Typecodes Colorant
Metallic based materials that impart fired color to glazes and bodies.
Minerals Magnetite
A black, hard, dense and stable crystalline mineral form of iron oxide.
Materials Manganese Granular
In ceramics, it is used primarily in clays and glazes to achieve fired speckle (including the brick industry).
Materials Granular Rutile
Materials Iron Pyrite
Materials Granular Ilmenite


Hardness (Moh) 6.5
Frit Softening Point 1538C D
Density (Specific Gravity) 5.18
By Tony Hansen
Follow me on

Got a Question?

Buy me a coffee and we can talk, All Rights Reserved
Privacy Policy