Dated source reference; not a live quote.
Facts and sources
Weight unit
1 troy oz = 31.1034768 g.Source: World Gold Council, Gold Jewellery · Checked: 2026-10-25
Karat conversion
Purity % = K ÷ 24 × 100; 22K ≈ 91.7%, 18K = 75%.Source: World Gold Council; arithmetic derivation · Checked: 2026-10-25
Millésimal fineness
999.9 ÷ 1,000 × 100 = 99.99%.Source: World Gold Council; arithmetic derivation · Checked: 2026-10-25
FAQ
- Is karat a weight unit here?
- For gold in this context it measures purity; troy ounces measure weight.
- Is 22K exactly 91.7%?
- 22 ÷ 24 is 91.666…%; 91.7% is rounded.
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