750 gold: jewelry with 18 carat

750 gold is the classic alloy for high-quality gold jewelry. Because pure gold is too soft a material for jewelry production, it is always alloyed with other metals by the goldsmith. Unlike gold bars or investment gold coins, jewelry therefore always consists of an alloy, i.e. a mixture of different metals that are melted together. The admixed metals are intended to make the gold jewelry harder, more dimensionally stable, and more scratch-resistant.

The proportion of pure gold in an alloy can be expressed both in parts per thousand and in carats. Both units describe the same and can be converted accordingly. The fineness of 750‰ thousand parts corresponds to a carat number of 18 carats.

750 jewelry gold is available in a wide range of colors, for example as white gold, yellow gold, or red gold, depending on the metal used in the alloy, such as copper, silver, or platinum. However, a piece of jewelry with 18 carat always consists of 75.0% pure gold.

Check fineness: 750 gold = 18 carat

In gold jewelry, the fineness is usually stamped in the form of a hallmark. In the case of rings, such a hallmark is usually found on the inside, while in the case of chains or pendants it is usually found on the clasp. This can be both the karat number, such as "18 kt." (more rarely "18k" or "18c") as well as the fineness in thousand parts, such as "750".

To check the correctness of the information, the acid test, also called line test, is used in the gold purchase. The gold piece to be tested is rubbed on a slate, which serves as a "touchstone", so that a clear line remains. Various assay acids are then applied one after the other to this fine test line. Each alloy has its own test acid, e.g. one for 18 carats, one for 14 carats, etc., each consisting of a specific mixture of hydrochloric acid and nitric acid (aqua regia).

If the abrasion on the touchstone twists or discolors, the alloy is below the tested fineness; if the line remains unchanged under the respective acid effect, the gold content corresponds to the respective karat activity.

Our purchase prices for jewelry, gold, silver and Co are always based on the current gold price.

The value of your pieces is therefore determined by the weight of your pieces in grams, the fineness of your gold and precisely the current price of gold.

Our prices for gold jewelry & silver

If you want to sell pieces of a color gold alloy, you will get the same price for all color facets. Since the value of a piece depends on the fineness, it is irrelevant when buying which metals were alloyed. However, the gold content of 18 carat yellow gold is the same as that of 18 carat red or white gold, namely 75%. For 18 carat yellow gold we pay the same as for 18 carat red gold.

Purchase of 750 gold at Gold & Co

With us you can sell all pieces of gold, but also items made of silver, platinum and palladium.

1. free evaluation of all your pieces

No matter if you come with a single ring or several pieces of jewelry to one of our stores in 1090, 1030 or 1220 Vienna: We evaluate both your gold and your silver free of charge and completely without obligation. If you want to sell your valuables, you will receive the money immediately in cash.

2. close examination of experts

We check each piece individually and determine how many carats they have. The higher the fineness, the higher the value of your pieces. In Austria, jewelry is mostly made of 585 gold, which is an alloy with 58.5% pure gold. In Italy or the Balkans, on the other hand, it is more common to find jewelry that is made of 18 karat gold, which is a 750 alloy.

If you want to sell different pieces, your parts will be separated individually by carat or fineness. We also check jewelry made of silver, palladium and platinum and pieces with diamonds or diamonds when buying.

3. comprehensive personal consultation

We take time for you and explain step by step the process of buying gold in Vienna. We are happy to answer all your questions about your pieces. A good consultation is a special concern for us!

4. 100% transparency

With us, you are present when weighing their pieces and can see the scales. Anything else would be unserious.

5. best prices at gold buying in vienna

In addition to free and accurate valuation and detailed advice, we offer top prices for your pieces. You can find all current purchase prices on our price overview page on Gold & Co.

You can't come to us in Vienna to one of our branches? For such cases there is the Gold & Co. Gold purchase from all over Austria by mail. Send us your gold, we estimate your pieces free of charge and without obligation and make you a fair offer. If you accept our offer you will get your money immediately - if not we will send your gold back to you free of charge.