Culimeta America offers Basalt Fibers and products made thereof.

From Wikipedia, the free encyclopedia, further information about the basalt and its unique properties: 

Basalt fiber is a material made from extremely fine fibers of basalt, which is composed of the minerals plagioclasepyroxene, and olivine. It is similar to carbon fiber and fiberglass, having better physical properties than fiberglass, but being significantly cheaper than carbon fiber. It is used as a fireproof textile in the aerospace and automotive industries and can also be used as a composite to produce products such as camera tripods.

Basalt fiber is made from a single material, crushed basalt, from a carefully chosen quarry source and unlike other materials such as glass fiber, essentially no materials are added. The basalt is simply washed and then melted.

The manufacture of basalt fiber requires the melting of the quarried basalt rock at about 1,400 °C (2,550 °F). The molten rock is then extruded through small nozzles to produce continuous filaments of basalt fiber.

There are three main manufacturing techniques, which are

  • centrifugal-blowing,
  • centrifugal-multi roll and
  • die-blowing

The fibers typically have a filament diameter of between 9 and 13 µm which is far enough above the respiratory limit of 5 µm to make basalt fiber a suitable replacement for asbestos. They also have a high elastic modulus, resulting in excellent specific tenacity—three times that of steel


Property Value
Tensile strength 4.84 GPa
Elastic modulus 89 GPa
Elongation at break 3.15%
Density 2.7 g/cm³

Comparison to other fibers:

Material Density (g/cm³) Tensile strength (GPa) Elastic modulus (GPa)
Steel re-bar 7.85 0.5 210
A-glass 2.46 3.31 69
C-glass 2.46 3.31 69
E-glass 2.6 3.45 76
S-2 glass 2.49 4.83 97
Silicon 2.16 0.206-0.412
Quartz 2.2 0.3438
Carbon fiber (large) 1.74 3.62 228
Carbon fiber (medium) 1.8 5.1 241
Carbon fiber (small) 1.8 6.21 297
Kevlar K-29 1.44 3.62 41.4
Kevlar K-149 1.47 3.48
Polypropylene 0.91 0.27-0.65 38
Polyacrylonit 1.18 0.50-0.91 75
Basalt fiber 2.65 4.15-4.80 100-110