Santo Domingo, 1809

Discovered c.1796 and reported in 1810 (lowering French prices?), the Santo Domingo platina was very poor, 46% Pt.

c.1810 : 1 Troy Ounce platina = $S 0.20

If "a few Maravedis" = M 10 (S$ 0.01984) per castellano:

c.1810 : 1 Troy Ounce "platina" (Yaqui ore, 40% unwashed sand) = S$ 0.134
c.1810 : 1 Troy Oz. platina (Yaqui platina, 46% Pt) = S$ 0.2237
c.1810 : 1 Troy Oz. Pt (Yaqui platina, intrinsic) = S$ 0.486

If "a few Maravedis" = M 15 (S$ 0.03) per Onza:

c.1810 : 1 Troy Ounce "platina" (Yaqui ore, 40% unwashed sand) = S$ 0.03
c.1810 : 1 Troy Oz. platina (Yaqui platina, 46% Pt) = S$ 0.054
c.1810 : 1 Troy Oz. Pt (Yaqui platina, intrinsic) = S$ 0.116