Convert from onca [Portuguese] to point

Unit Definition (onca [Portuguese])
The onça, once, oncia, onza is traditional names for the ounce unit in Romance languages. The Portuguese onça and Spanish onza equal 1/16 libra or about 28.69 grams (1.012 ounce).

Unit Definition (point)
The point is a unit of mass used for precious stones such as diamonds. One point equals 0.01 carat, or exactly 2 milligrams.