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Sterling Platinum is a trademarked silver alloy developed by ABI Precious Metals, containing minimum 90% silver and 10% platinum.
This alloy is harder, more durable, and tarnish-resistant than traditional sterling silver, with a brighter appearance. It’s diamagnetic, hypoallergenic, but still tarnishes due to its high silver content. Used exclusively for jewelry, not bullion.
Learn more about Sterling Platinum below!
Table of Contents
What is Sterling Platinum?
Platinum Sterling is a trademarked name for a silver alloy developed by ABI Precious Metals ((created in 2003 by Marc Robinson, and its solder by Chuck Bennett).)
This alloy is a mixture of platinum and silver where a minimum of 90% silver is mixed with a minimum of 10% platinum.
90:10 is composition is standard, but some variations may contain as little as 0.05% platinum.
Platinum Sterling is harder and more durable than traditional sterling silver, with increased tarnish resistance and a brighter appearance.
Is Sterling Platinum Magnetic?
No, Sterling Platinum isn’t magnetic. It’s diamagnetic. This means Sterling Platinum is weakly repelled by a magnetic field.
Sterling Platinum is diamagnetic because 90% silver is diamagnetic while 10% pure platinum is paramagnetic (platinum is weakly attracted to an external magnetic field due to the presence of unpaired electrons).
Is Sterling Platinum Hypoallergenic?
Yes, Sterling Platinum is hypoallergenic. This means this silver alloy is unlikely to cause serious reactions in people with known metal allergies.
Sterling Platinum isn’t allergenic because silver is hypoallergenic and platinum is hypoallergenic as well.
Does Sterling Platinum Tarnish?
Yes, Sterling Platinum tarnishes.
Sterling Platinum tarnishes because pure silver tarnishes. Pure platinum doesn’t tarnish, but Sterling Platinum contains too little platinum compared to its pure silver content.
Is There Bullion Made from Sterling Platinum?
No, there’s no bullion made from Sterling Platinum.
Sterling Platinum is a modern silver alloy used exclusively in jewelry, and not for investment-grade bullion.
You can get investment-grade platinum bullion (also called IRA-approved platinum) from Augusta Precious Metals, the best US gold IRA company.
This is the bullion you can add to your platinum IRA account.
Is There Jewelry Made from Sterling Platinum?
Yes, there’s jewelry made from Sterling Platinum.
See example below.

What is the Hallmark for Sterling Platinum?
The hallmark for Sterling Platinum is simply “Sterling Platinum”. The hallmark for Sterling Platinum is neither an official silver hallmark nor platinum hallmark.
What is Sterling Platinum? Conclusion
Sterling Platinum is a trademarked silver alloy developed by ABI Precious Metals, containing minimum 90% silver and 10% platinum.
This alloy is harder, more durable, and tarnish-resistant than traditional sterling silver, with a brighter appearance. It’s diamagnetic, hypoallergenic, but still tarnishes due to its high silver content. Used exclusively for jewelry, not bullion.
Reference:
- Platinum sterling jewelry collection- https://platinumborn.com/collections/modern
- Experience with platinum sterling- https://orchid.ganoksin.com/t/experience-with-platinum-sterling/43512

Nikola Roza
Nikola Roza is a blogger behind Nikola Roza- SEO for the Poor and Determined. He writes for bloggers who don't have huge marketing budget but still want to succeed. Nikola is passionate about precious metals IRAs and how to invest in gold and silver for a safer financial future. Learn about Nikola here.