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Basic Knowledge of K18 | Trivia about "gold" used for jewelry

Basic Knowledge of K18 | Trivia about "gold" used for jewelry

K18 (18k gold), K14 (14k gold), and K10 (10k gold) materials are commonly used for jewelry. What is the difference between them?

The Story of Gold

Gold is a precious metal that has been valued since ancient times for its beautiful color and luster.
It is said to be the first metal used by mankind as an ornament.
Gold is mined from veins such as gold mines or
Gold is mined from veins such as gold mines, or collected from gold sand deposited on the banks of rivers downstream from gold veins.
Only about 5 grams of gold can be extracted from 1 ton of gold ore.
The total amount of gold mined by mankind to date is approximately 170,000 tons.
This is comparable to three and a half Olympic swimming pools.
The unexploited reserves are said to be about 70,000 tons, or less than one and a half to two cups of pools.
It seems very small, but gold can be melted down and reused.
Today, it is common to recover gold used in electrical appliances and to recycle jewelry.

Gold used for jewelry

To begin with, gold itself is very soft and has a property called "ductility," which means that it can be stretched.
One gram of gold can be stretched up to 3,000 meters.
There are gold leaves stretched on a flat surface and gold threads stretched in the form of thread.
Because of this softness and ductility, pure gold is not suitable for jewelry in its raw state.
In particular, it is not strong enough to be used as claws for setting stones.
Therefore, gold is generally mixed with silver or copper to make an alloy for jewelry.
The gold content of a piece is expressed as a 24% fraction, such as K18 (18-karat gold), K14 (14-karat gold), K10 (10-karat gold), and so on.
K" stands for "karat," a unit of 24th fraction.
In the case of K18, 18/24 is gold.
This means that K18 contains 75% gold, K14 contains 58%, and K10 contains 41.7%.
Each of these means a different purity of gold.
The lower the gold content, the higher the percentage of tarnish-prone silver and copper.
This means that K10 tarnishes more easily than K18.
The purity of gold used in jewelry generally varies by country.
K18 is commonly used in Japan and Italy, K14 in the United States, and K9 in the United Kingdom.
Incidentally, "karat" is also used in the terminology of jewelry, but it is spelled differently in jewelry: "carat" is used to express the mass of a gemstone.
This is a unit for expressing the mass of a gemstone, and 1 carat = 200 grams.

Color of Gold

Yellow gold", "pink gold", "white gold", etc. are used in jewelry.
The color of gold is changed by changing the ratio of silver or copper mixed with gold.
For example, in the case of yellow gold, the ratio of silver and copper mixed with gold is generally silver:copper = 6:4.
If more copper is mixed in with the gold to give it a reddish color, it is called pink gold, and
For white gold, the ratio of silver is increased.
Red gold and green gold are also made by changing the ratio of silver to copper.

ELEMENT STAR's K18 jewelry

All ELEMENT STAR jewelry is designed to be freely combinable with pendants, necklaces, and
genderless necklaces, and pendants that can be freely combined with other jewelry. Our jewelry is made of K18 material, which is resistant to discoloration over time.
It is our hope that our jewelry will remain beautiful and be used for a long time.
and grow up as vintage jewelry in your hand.
Scratches and stains on the necklace will become a part of its charm.
We make our jewelry with great care in the hope that they will become something unique and special for our customers.
However, it does not mean that K18 does not tarnish at all.
The initial discoloration can be taken care of by wiping with a soft cloth.
We recommend that you take care of it frequently.
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