Basalt Rock Dust 5lb.
Instant response time from a real human!
The RBSC email correspondent went the extra mile to track down and provide the mineral content data sheet from the supplier. This is quality top notch Blue Ridge Meta-Basalt with an incredible mineral content. It has a slightly higher magnetic susceptibility (mostly because of the added magnetite fraction) so for those who are after a mineral packed paramagnetic rock dust look no further!