  A Faraday force magnetometer is presented for measurements of magnetization
at temperatures down to 100~mK and in magnetic fields up to 14~T. The specimen
is mounted on a flexible cantilever forming a force-sensing capacitor in
combination with a fixed back plate. Two different cantilever designs are
presented. A torsion resistant cantilever allows to measure magnetization of
highly anisotropic single crystal samples. Measurements of the metal organic
quantum magnets (C$_5$H$_{12}$N)$_2$CuBr$_4$ (BPCB) and NiCl$_2$$\cdot$4
SC(NH$_2$)$_2$ (DTN) demonstrate the device's capabilities. Routinely, a
specimen's magnetic moment is measured with a resolution better than $10^{-7}$
A$\,$m$^2$ ($10^{-4}$ emu). The device in miniaturized to fit is almost any
cryostat.
