  By imposing the constraints of charge symmetry we show that the strangeness
magnetic moment of the nucleon can be expressed in terms of empirical magnetic
moments and ratios of valence quark magnetic moments. The latter are determined
using modern chiral extrapolation techniques and recent low mass lattice QCD
simulations of the individual quark contributions to the magnetic moments of
the nucleon octet. The result is a precise determination of G_M^s, namely
-0.043 +/- 0.026 mu_N, which is consistent with the latest experimental
measurements.
