Jakarta, Pintu News â Fineness is a technical term used to measure the level of purity of precious metals, such as gold, in an alloy. Unlike the 24 karat system, fineness is usually expressed in parts per thousand (millesimal fineness) or as a percentage.
Understanding fineness figures is crucial for jewelry investors and collectors to determine the intrinsic value of the gold objects they own. Here is an in-depth explanation of the concept of gold purity, including specific analysis for 4% fineness, 50 fineness, and 999 fineness.
In the metallurgical world, pure gold is very soft, so it is often alloyed with other metals (copper, silver, or nickel) to increase its durability. The basic formula for calculating fineness is:

Based on the formula, the resulting number indicates how many parts of pure gold are present in 1,000 parts of the alloy.
Each purity number represents a different category of use in the global market.
Fineness 999 refers to gold with a purity level of 99.9%. On a millesimal scale, this number is considered the highest standard of pure gold commercially available for investment.
The term fineness 50 refers to the number 50/1000, which when converted to a percentage is equivalent to 5% pure gold. This is far below typical jewelry standards (such as 18K or 14K).
Fineness of 4% means that there are only 4 parts of gold in 100 parts of metal (or 40/1000 in millesimal scale). This level usually refers to products that are categorized as low-level Gold-Filled or Gold-Plated.
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Here is a summary table to make it easier to identify the differences between the three types of fineness:
| Mentions | Percentage | Parts per 1,000 | Rust Equivalent (Estimated) | Main Categories |
| Fineness 999 | 99,9% | 999 | 24 Karat | Investment / Bullion |
| Fineness 50 | 5,0% | 50 | < 2 Karat | Industrial / Dental |
| Fineness 4% | 4,0% | 40 | < 1 Carat | Accessories / Plated |
In conclusion, 999 fineness is the top choice for those looking for a store of wealth, while 50 fineness and 4% fineness are more functional for low-cost industrial or aesthetic needs.
As blockchain technology develops, gold can now be owned not only in physical form such as jewelry or bars, but also in digital form through gold-based crypto assets.
Crypto gold offers a more flexible, practical, and modern way of investing in gold than physical gold. Some of the advantages of crypto gold investment in Pintu are:
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As a safe crypto app, Pintu provides a crypto trading experience to access crypto gold investment easily and conveniently. You can also see today â s gold jewelry price and today â s gold bullion price to support your investment activities and portfolio diversification as well as learn crypto through Pintu Academy.
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*Disclaimer
This content aims to enrich readersâ information. Pintu collects this information from various relevant sources and is not influenced by outside parties. Note that an assetâs past performance does not determine its projected future performance. Crypto trading activities are subject to high risk and volatility, always do your own research and use cold hard cash before investing. All activities of buying and selling Bitcoin and other crypto asset investments are the responsibility of the reader.
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