What is Platinum 900?

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Platinum 900 is an alloy containing 90% pure platinum and 10% other metals like ruthenium or iridium, added for enhanced durability and workability.

It’s popular for jewelry, especially engagement and wedding rings, offering a balance of purity, strength, and cost.

The alloy is non-magnetic (paramagnetic) and hypoallergenic, making it suitable for most people. While no bullion is made from Platinum 900 (investment-grade platinum is typically higher purity), it’s commonly used in fine jewelry.

The hallmark “900” indicates its purity level, and its value equals 90% of current platinum spot prices.

Learn more about platinum 900 below!

Table of Contents

What is Platinum 900 (Definition and Meaning)?

Platinum 900 is a platinum alloy that contains 90% pure platinum and 10% other metals. These other metals, such as ruthenium or iridium, are added to enhance the platinum’s durability and workability for jewelry making.

Platinum 900 is a popular choice for jewelry, particularly for engagement and wedding rings, offering a balance between purity, strength, and cost.

Is Platinum 900 Magnetic?

No, 900 platinum isn’t magnetic, it’s paramagnetic.

Platinum 900 doesn’t magnetize because 90% pure platinum within this alloy is paramagnetic. This is especially true when 90% pure platinum is alloyed with 10% of another paramagnetic metal, for example iridium.

Platinum 900 becomes magnetic when 90% of pure platinum is alloyed with 10% ferromagnetic materials and metals like iron, cobalt, nickel and some stainless steel forms.

But in that case the magnetic effect will be weak and you’ll need a strong magnet to elicit a noticeable reaction from your PT900 jewelry piece.

Is Platinum 900 Hypoallergenic?

Yes, 900 platinum is hypoallergenic. Meaning it’s safe for most people to wear platinum jewelry or platinum-plated jewelry.

However, platinum allergies exist and it is possible to be allergic to this precious metal, especially if you have sensitive skin or you actually have jewelry made from fake platinum.

Is There Bullion Made From Platinum 900?

No, there’s no bullion made from 900 platinum. Instead, investment-grade platinum bullion is exclusively made from platinum 999 (fine platinum).

Investment-grade platinum coins and bars are also called IRA-approved platinum bullion and it’s these coins and bars you can include as part of your gold IRA or platinum IRA account.

Note: Augusta Precious Metals is the best precious metals investment company in the USA. You can get in touch with them to buy the platinum bullion you want.

With Augusta you can purchase platinum coins and bars to keep at your home. Or you can purchase as part of your new platinum IRA account which Augusta will help you open.

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Is There Jewelry Made From Platinum 900?

Yes, there’s jewelry made from 900 platinum.

This platinum alloy is a popular choice for fine jewelry due to its high purity, durability, and resistance to tarnish.
Platinum 900 has 5% less platinum than platinum 950, a gold standard for platinum jewelry design.

But it’s still a high purity platinum alloy where the remaining 10% within the alloy don’t take anything from platinum’s shine and elegance, but provide additional strength, durability and scratch resistance.

Platinum 900 is naturally resistant to tarnish and corrosion because of it’s high platinum content, and this alloy is also highly unlikely to cause allergenic reactions, even in sensitive people who can’t wear most other jewelry.

What is the Hallmark for Platinum 900?

The hallmark for 900 platinum is typically “900” stamped or laser-etched onto the jewelry piece. Other markings, such as “Pt” or “PLAT”, may also be present to indicate platinum, but the “900” hallmark specifically denotes the purity level.

Some platinum 900 pieces may also include other hallmarks like the assay office mark, date letter, or traditional fineness symbol.

Here’s an example of platinum 900 hallmark. In this case 90% platinum is alloyed with 10% iridium.

Platinum 900 hallmark example. In this case 90% platinum is alloyed with 10% iridium.

Note: 10% of Iridium is alloyed with platinum 900 to increase platinum’s hardness, durability, and resistance to wear and deformation.

The addition of iridium also improves the alloy’s high-temperature resistance and makes it more suitable for applications where strength and longevity are crucial.

The “dog head” platinum hallmark exists and is used on platinum-made items with a minimum purity of 850 parts per thousand (‰). It indicates that the platinum content is at least 85% pure.

How Much is Platinum 900 Worth?

Platinum 900 is 90% pure, and is therefore worth 90% of the current platinum spot price.

Platinum spot price changes multiple times during the day because of the interplay of supply and demand so the value of your platinum 900 changes with it.

What is Platinum 900? Conclusion