Silver tests and their impact on the quality of the metal

Find out exactly what silver fineness marks mean and how they affect the quality of the metal.

Table of contents

• What is silver fineness and what does it mean?
• Why isn't jewelry made of pure silver?
• What are the most popular silver finenesses?
• Which silver fineness is best for jewelry?

What is silver fineness and what does it mean?

The silver fineness indicates the percentage of pure metal in a given alloy and is expressed in parts per thousand. It informs how many parts of silver there are per thousand units of product weight. For example, a fineness of 925 means that the alloy contains 92.5% pure silver, with the remaining 7.5% being additives – most often copper – which improve the mechanical properties of the material.

The authenticity and quality of the product is confirmed by a hallmark, i.e., a stamp placed by the Assay Office. As a rule, the higher the fineness, the greater the value of the metal, which directly translates into the final price of the product.

Why isn't jewelry made of pure silver?

Pure silver with a fineness of 999 is characterized by exceptional softness, which makes it very susceptible to scratches, deformation, and mechanical damage. In everyday use, jewelry made of such material would quickly lose its original appearance and functionality.

For this reason, silver alloys with other metals are used in jewelry. This process increases the hardness and durability of the products without compromising their aesthetics or value. Pure silver is mainly used in:

• numismatics,
• investment products such as bullion bars and coins.

What are the most popular silver finenesses?

The Polish hallmarking system, in force in its current form since 1986, classifies silver products based on the content of pure metal in the alloy. The most common hallmarks include:

• 925 fineness,
• attempt 875,
• attempt 830,
• attempt 800.

The most widely used alloy in jewelry is 925, valued for its ideal combination of aesthetics and durability. Products made from this alloy retain their shape and luster for many years.

Lower grades, such as 875, 830, or 800, are mainly found in utility and antique items, including:

• cutlery,
• tableware,
• antiques.

The highest grade silver, 999, is primarily used in the production of silver collector coins and investment bars, where maximum purity of the metal is crucial.

Which silver fineness is best for jewelry?

The best choice for jewelry is 925 sterling silver. It combines a high content of pure metal with adequate hardness, which makes it extremely durable and resistant to everyday use. Jewelry made from this alloy is less susceptible to scratches and deformation, while retaining its attractive appearance for a long time.

Although lower fineness grades may be harder, they are more prone to tarnishing and oxidation. In contrast, 925 fineness offers a balance between aesthetics, durability, and market value, which is why it has remained the standard in silver jewelry production for years.