The difference between 18 carat and 24 carat gold should be found in its purity. 24 carat gold is completely pure and 18 carat gold has a percentage of impurity with it. This metal is found in flakes or grains among stones and is often quite pure and has a very important place in the jewelry industry. 24 carat gold is without impurities and 18 carat gold has a certain percentage of impurities.
Gold applications
This expensive metal, in addition to its main uses, i.e. jewelry making, ornaments and artistic uses, also has many uses in industry. Among these applications, we can mention the electronics industry, dentistry, glass making, etc.
2ct gold and 2ct gold
Gold is used as an alloy with the size of metals. Copper, nickel, silver, palladium, etc. are good metals to combine with gold in an alloy. Gold grade depends on the amount of gold in the alloy with which a certain product is made. The carat number of all gold is 24, and if the gold is 24 carat, it means that the gold is pure and not an alloy mixed with another metal. Usually, the higher the carat, the softer and more malleable gold is, that's why they combine gold with various alloys to make it more durable and reach the desired strength.

Gold 2ct
This gold is the purest type of gold that can be used in jewelry and crafts. 24 carat gold is completely yellow and shiny. Of course, keep in mind that 24 carat gold is softer and less strong as mentioned.
2ct gold
This type of gold is a famous alloy of gold and copper or gold and nickel, 75% of which is gold and the rest is other metals. This type of gold is very resistant and has all the characteristics of gold except softness and malleability.

Which grade is better?
Different countries have adopted standards for the common gold of that country. These standards include: Iran: 18-karat gold with a purity of 75% Southern European and Mediterranean countries: 18-karat gold England: 9-karat gold with a purity of 375% and a gold percentage of 5 /37
Germany, 8 carat gold with a purity of 333 and 33.3 gold percentage
Saudi Arabia and other Arab countries: 21 gold
Indian subcontinent: 24 carat
Which carat is better is not a correct question, because if the purpose of buying gold is to use it as an ornament, it becomes a matter of taste. It goes without saying that in different countries of the world that have accepted different carats as standards, gold can be found with other carats and the purpose of determining the standard is to establish rules and regulations in these countries.

