Basalt Fibers & Basalt Fiber Products are less prominent than those made from Glass, Carbon or Aramid. Partially the reason may be that basalt is not manufactured in the USA.
In simple terms, Basalt Fibers are made from crushed stones. Since they are not manufactured with various chemicals and basically are made from a rock, which is transformed into a fiber, they are considered a “green product”. In other words, it can be fully recycled.
This Post provides information on the making of Basalt Fibers and applications. There are a few “good reads” in the links below.
Introduction to Basalt Fibers: https://allendalefibertech.com/wp-content/uploads/2023/02/Basalt-Technical-Fibers.pdf
Basalt Fiber Reinforced Polymer Composites: https://allendalefibertech.com/wp-content/uploads/2023/02/Basalt-Fiber-Reinforced-Polymer-Composites.pdf
Properties of Basalt Plastics and of Composites Reinforced by Hybrid Fibers in Operating Conditions: https://allendalefibertech.com/wp-content/uploads/2023/02/InTech-Properties_of_basalt_plastics_and_of_composites_reinforced_by_hybrid_fibers_in_operating_conditions.pdf
About Electro-Physical Properties of super thin Basalt Fibers: https://allendalefibertech.com/wp-content/uploads/2023/02/05-Nikoghosyan-pdf.jpg