I checked a few rocks in my collection for magn...

I checked a few rocks in my collection for magnetism. Basalt is usually magnetic, garnet shist can be mildly magnetic, my specimans of Soapstone, serpentinite is magnetic. Serpentinite is metamorphosed serpentine (which is produced during alternation of olivene and pyroxene or impure limestones). Epidosite (altered epidote and quartz) is also magnetic.