Troy Weight Small 171×320 Medium 342×640 Large 547×1024 Download Tiff Original 1281×2400 | (1.2 MB) Description Troy weight is a system of units of mass customarily used for precious metals, black powder, and gemstones. Keywords metals, troy weight, units of mass Galleries Miscellaneous Math Tools Source: Encyclopaedia Britannica (11th ed., vol. 28) (New York, NY: The Encyclopaedia Britannica Company, 1910)
