تحويل الحجر إلى أونصة تروي: المعادن الثمينة والمجوهرات وتجارة الأحجار الكريمة

One stone equals exactly 229.8 troy ounces (more precisely 229.7975 troy ounces). This conversion derives from the definition: 1 stone = 14 pounds avoirdupois = 6,350.29348 grams; 1 troy ounce = 31.1034768 grams. Therefore, 6,350.29348 ÷ 31.1034768 = 229.7975 troy ounces. This differs from avoirdupois ounces (1 stone = 224 avoirdupois ounces) because troy ounces are heavier, making them unsuitable for general weight but ideal for precious metals where precision matters.

Troy ounces became the precious metals standard because they provide superior precision for high-value commodities. The troy system uses 12 ounces per pound (versus 16 avoirdupois), allowing finer weight divisions historically essential when weighing gold and silver. This system originated in medieval France and became standardized across European precious metals markets. The stone, designed for bulk commodities and body weight, lacks the precision needed for valuable materials where small weight variations represent significant monetary differences. International precious metals exchanges (COMEX, LBMA) adopted troy ounces as the universal standard, making it the global language of precious metals trading.