According to an American visitor, by 1854 the Gold Yield had collapsed -75% from years prior to 1852.
Citation: New Granada: Twenty Months in the Andes: With Maps and Illustrations; Isaac F. Holton (1856) p.260
The issue of contraband export dogged estimates well in the 1850s. Assuming the Franc/Piastre exchange at 5:1 and the Colombian Fine-Gold Price at S$ 17.61 per English Ounce Troy, a rather unlikely massive export of 7,949 kg of Gold occurred circa 1854.
Likewise, the amount of Colombian platina exported (S$ 30,000 or 188.71 kgs) was barely 2.35% the Gold total but probably much closer to the true export amount.
Citation: Dictionnaire universel théorique et practique du commerce et de la navigation ; Gilbert-Urbain Guillaumin (1859) p. 546
As reported in 1857 (somewhat dated?) Colombia was annually exporting 600 kilograms or ~ 19,290 ozt platina.
c.1854-6? Export Cost of Gold 'Antioquia to Barranquilla' S$ per Kg.
c.1854-6? Export Cost 'Antioquia to Barranquilla' S$ 15.80 per carga (~115.0 Kg.) or S$ 0.1374 per Kg.
c.1854-6? Import Cost 'Barranquilla to Antioquia' S$ 18.80 per carga (~115.0 Kg.) or S$ 0.1634 per Kg ; machinery to mines, S$ 22. per carga (~115.0 Kg.) or S$ 0.1912 per Kg