Compare the density of gold in a ring and in a necklace?

Answer 1

The density of a given substance will not change as long as the purity remains the same. That is, if both the ring and the necklace are made of 14 karat gold, they will have the same density, but the overall mass of gold in each item is different.

Answer 2

Get a small accurate scale, preferably one that you can hang the ring and necklace from rather than set them on.

Measure the weight of each. Then place the scale so that the item being measured will but submerged in a glass of water. Make sure the whole item is under water and not touching the bottom of the glass. To get the maximum accuracy you should suspend the items with a very thin string, like a piece of dental floss. If you put the metal hook of the scale in the water, it will throw the results off some.

The one that has the greater change in weight (by percentage) is the less dens of the two. Using the density of water you could calculate the actual density of each, but that's a different question.

Answer 3

The density of gold is the density of gold, no matter where its used. In jewelry most gold is mixed with copper and the percent mixture is given by 24K (100% pure gold); 18K (75% pure gold); 14K (58% pure gold); 10K (42% pure gold); etc. To know the amount of gold in a piece of jewelry you have to first get its weight then multiply by which ever K percentage applies. Necklaces can be solid like a ring ,but some times they are hollow inside so they look heavier then they really are. When you weigh it you find out. Also, both rings & necklaces can be gold plated. This is such a thin coating of gold that the gold value is insignificant. The difference between real K gold and gold plated can sometimes be found stamped on the jewelry, otherwise it has to be tested with acid.