Note 3
From 'Applying Genius' part of the First lecture on The Political Economy Of Art by J Ruskin

Several reasons may account for the fact that goldsmith's work is so wholesome for young artists; first, that it gives great firmness of hand to deal for some time with a solid substance; again, that it induces caution and steadiness—a boy trusted with chalk and paper suffers an immediate temptation to scrawl upon it and play with it, but he dares not scrawl on gold, and he cannot play with it; and, lastly, that it gives great delicacy and precision of touch to work upon minute forms, and to aim at producing richness and finish of design correspondent to the preciousness of the material.