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Calculating the Gold Content Value of a Jewelry Piece Therefore, we’ve determined that the jeweler’s offer to buy the piece at $15 comes to about 65% of its gold value. So the 3 gm, 14K item contains around $23 worth of gold, when gold sells at $400 per troy ounce.

To get the 14K gold price for the item multiply $39 by 0.6.

To get the pure gold price for the item, multiply 3 gm times $13.

(1 troy ounce equals approximately 31 gm).

To get the gram price, divide $400 by 31.

GramsĪ dealer wants to buy a 14K gold item weighing 3 gm for $15. Therefore, we’ve determined the jeweler’s markup at $5 for the item comes to slightly more than triple the gold value. So the 3 gr, 14K item contains about $1.49 worth of gold, when gold sells at $400 per troy ounce.

To get the 14K gold price for the item, multiply $2.49 by 0.6.

To get the pure gold price for the item, multiply 3 gr times $0.83.

To get the grain price, divide $400 by 480.

GrainsĪ dealer wants to sell a 14K gold item weighing 3 gr for $5. Therefore, we’ve determined the jeweler’s markup for the alloys (and everything else) at $90 for the item comes to about 2.5 times the value of the gold. So, the 3 dwt, 14K item contains $36 worth of gold, when gold sells at $400 per troy ounce. (Remember, 14K gold contains approximately 60% gold and 40% alloy).

To get the 14K gold price for the item, multiply $60, the pure gold price, by 0.6.

(This would be the price IF the item were 24K or 100% gold). To get the pure gold price for the item, multiply 3 dwt, the weight of the item, times $20.To get the pennyweight price, divide the daily gold price per troy ounce, $400, by 20.PennyweightsĪ dealer wants to sell a 14K gold item weighing 3 dwt for $90.

However, the math remains the same, regardless of the daily price of gold). (Editor’s note: Yes, this article shows its age. Let’s calculate the markup in these cases, using $400/troy ounce as the daily gold price. Also, you can get a good idea of the jeweler’s markup.īelow, you have three examples of gold items sold by pennyweight, grain, and gram. However, if you know the weight and karat of the gold item, you can calculate the gold value yourself. In other words, you’ll have to deal with an arbitrary markup for a gold item. When sellers say they don’t sell on the basis of weight, they’re pricing according to what the traffic will bear. 12K gold has 12 parts gold and 12 parts alloy metal, or 50% purity.ĭivide any K value by 24 to determine the purity percentage, or consult the following table.ġ4K yellow gold goalie mask pendant. In other words, it measures the ratio of pure gold to alloy metals. The karat value (K) of a gold item measures the purity of its gold. You’ll find yourself frequently dealing with these three weight references on a “price per _” basis. (Don’t confuse the abbreviations of the last two). In particular, learn the conversions for pennyweight (dwt), grain (gr), and gram (gm). Sadly, I think sometimes this is solely done to keep the average consumer from making quick and accurate calculations. However, depending on the circumstances, the terms and units of weight referenced may vary. Jewelers weigh gold and the metals used for alloying in troy ounces.