The data below assumes the use of KAuCl4 and Na2S2O3.H2O for sensitization:

The data are stated as gold/sulfur in milligrams / mole of silver

1/3 for 1.0 micron grains
5/15 for 0.5 micron grains
35/100 for 0.1 micron grains

The attached chart shows the relationship to the vAg and the crystal habit that is formed. From this, you can see that my crystals in the second attachment are made at a vAg value between 7.5 and 8. The extreme rounding is due to the ammonia used to digest (grow) the crystals, and if taken much further the crystals would be nearly spherical.