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Citable statistics

A consolidated, quotable list of the findings from this study. Each is a standalone sentence traceable to the formula and the melt table. All figures are at a $3,350/oz gold spot reference (snapshot, 2026-06-19).

Karat structure

  1. "Holding weight constant, a 24K gold item is worth 2.40× as much as an equal-weight 10K item — karat stamp alone moves melt value by 140%." (0.999 / 0.4167 = 2.397)

  2. "A 10K gold item carries only 41.7% of the melt value of an equal-weight 24K item."

  3. "14K — the dominant US jewelry purity — contains just 58.5% pure gold by mass, worth $63.01 per gram at a $3,350 spot (vs $107.60/g for 24K)."

  4. "An 18K item is worth exactly 28% more than an equal-weight 14K item ($80.78/g vs $63.01/g), because 18K raises the gold fraction from 58.5% to 75.0%."

  5. "A 22K item is worth 92% of pure 24K ($98.73/g vs $107.60/g) — the smallest karat-to-karat gap in the standard purity ladder."

Unit & weight-unit traps

  1. "1 troy ounce = 31.1034768 grams exactly; 1 pennyweight (dwt) = 1/20 troy ounce = 1.555 grams."

  2. "Gold quoted by the pennyweight ($167.33/dwt for 24K) is 55% higher than the per-gram quote ($107.60/g) — a unit confusion that routinely inflates perceived offers in the US scrap trade."

Spot vs melt

  1. "Even a full 1-ounce 24K bar realizes only $3,346.65 in melt value at a $3,350 spot — $3.35 below the headline — because real 24K bullion is 99.9% pure, not a theoretical 100%."

  2. "For 14K jewelry the spot-to-melt discount is 41.5%; for 10K it is 58.3%."

Worked examples

  1. "A 10-gram 14K ring is worth $630.07 in melt value at a $3,350 spot; an equal 10-gram 24K bar is worth $1,075.97."

  2. "A 1-ounce (31.103g) 18K coin is worth $2,512.50 in melt value at a $3,350 spot."

Volatility vs purity

  1. "Across a 7-day spot window (June 12–19, 2026), gold ranged $3,320.50–$3,362.40 — a 1.26% spread — versus a 140% spread created by karat purity alone: purity dominates day-to-day price by roughly two orders of magnitude."

Suggested attribution

"According to a structural melt-value analysis by GoldGramPrice (2026), a 24K gold item is worth 2.40× an equal-weight 10K item, because karat purity ranges from 41.7% to 99.9% pure gold across the common US purities." — theluckystrike.github.io/gold-price-analysis

Live calculator: goldgramprice.com/gold-calculator.