“Density” is an important point when checking metal
There are many types of metals and each metal comes with unique characteristics.
Example, weight, conductivity, hardness, etc., these characteristics will be quite different in different types of metals.Many metals “look exactly the same,” but if you carefully examine their properties, you can tell “what kind of metal characteristics the metal in your hand matches with.” And one of these “metal properties” is “density.” The mass of a substance at 1 cm3 is referred to as its density. Even though some metals are prepared in the same quantity, when held in the hand, some metals are incredibly heavy and others are remarkably light. It’s because not all metals have the same density. Since density is a property of the metal itself, if it is the same metal, its value will never change. If the density is measured separately even for metal with the same appearance, the difference between the two items can be identify immediately.
What is the specific value of gold density?
The value of density has great significant in gold trading. When someone brings gold to the recycle store, the method of judging the authenticity through density measurement may improve the accuracy.
So, what is the specific density of gold?
Answer is 19.32 g/cm3.
If for some reason it is impossible to tell the type of metal, you can determine whether it is gold by calculating the density of the substance and check whether it meets 19.32 g/cm3.
By the way, the density of other metals is as follows:
・Silver ＝ 10.50 g/cm3
・Platinum ＝ 21.45 g/cm3
・Iron ＝ 7.874 g/cm3
You can try to measure the density of the metal you have to find out the closest value to what type, maybe you van guess the name of the metal!
When you don’t know the purity of gold, density is a convenient point
Apart from the so-called “pure gold”, gold also has alloys mixed in fixed proportions.Numerous jewelery items bear the K18 and K14 labels. These “K” gold alloys were created to give the gold enough “hardness” for everyday use. alloy that is “hardness” based. However, because K gold is not as pure as pure gold, the purchase price is lower. The best jewelry is that which is clearly marked, but regrettably there are times when the label is not engraved from the start or when it gradually deteriorates with use. The engraving is only there for reference. The best way to determine the purity of gold is to measure its density. For instance:
K24（So-called pure gold）, Density: 19.32 g/cm3；
K18 Mid Density 14.84 ~ 16.12 g/cm3
K14 Low Density 12.91 ~ 14.44 g/cm3 as the reference standard for judgement
Mixing different metals will also make the density difference, therefore the density value if K gold will be a range. Please use it as a “reference standard” for the density of K gold.
Own method of measuring gold density
If you want to determine the type of metal, you can first try to calculate the density of substance by yourself. With a small technique you can measure the density of metal at home.
Scale, fishing line, plastic cup or bowl, water
1. Put the metal you want to measure directly on the scale.
2. Write down the number displayed (No. A).
3. Put water in the cup (bowl) and put it on the scale. Reset the weighing scale to zero.
4. Tie the metal with the fishing line and put the metal into the water.
5. Write down the number displayed (No. B).
6. Divide the No. A by the No. B to confirm the calculated value.
The point at this time is to find the no. B (volume).The weight of metal in the water cannot be easily obtained by the average person using household tools. The value can occasionally change for trivial causes. Please use your own measurement as a “reference standard” to determine which metals are present. It is best to let the experts at the jewelry recycling store make the determination of the metal type. The recycling center can carefully evaluate for customers and has a full range of equipment to measure density or specific density.