Dear friends: This is very interesting:
Effective mass -- the smaller, the better:
0.970mg Shure "bi-radial" (0.4x0.7mil, MM)
0.750mg Ortofon X1-MCP (p-mount, high output MC)
0.500mg Ortofon OM10 stylus (bushed elliptical, MI)
0.400mg Ortofon OM20 stylus (nude elliptical, MI)
0.400mg Ortofon X5-MC (HOMC, nude FG)
0.370mg Shure Elliptical (0.2x0.7mil, MM)
0.330mg Shure bi-radial on V15-III (MM) (berillium control rod)
0.300mg Ortofon OM30 stylus (nude Fine Line), OM40 (nude FG), MI
0.290mg Technics EPC-P202C (p-mount, MM)
0.290mg Shure HE on V15-IV (MM) ("telescopic shank")
0.270mg Denon DL-301 (MC)
0.250mg Denon DL-207 (MC)
0.240mg Van den Hul Colibri (MC)
0.230mg Technics EPC-P310MC (p-mount, MC)
0.220mg Ortofon Jubilee (MC)
0.180mg Denon DL-303 (MC)
0.170mg Shure Micro-Ridge (0.15x3.00mil, MM)
0.168mg Denon DL-305
0.109mg Technics EPC-P205CMK4 (p-mount, 0.2x0.7mil, MM)
0.098mg Technics EPC-100CMK3 (MM)
0.077mg Denon DL1000 (MC)
0.055mg Technics EPC-P100CMK4 (p-mount, MM)