Jewelry, Gems, & Minerals/platinum

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Question
I have a question about platinum jewelry, particularly about it being magnetic. I'd never heard of this before, until I heard someone mention dropping a platinum ring into a floor register and being able to pick it up using a magnet.

My engagement ring and wedding band are both platinum (or so I had believed). Out of curiosity I tried picking them up with a magnet. The wedding band was easily picked up by the magnet, however the engagement ring was not.

Would this be because it's heavier with the diamond (the wedding band is diamond as well, but has several very small stones, as opposed to the larger center stone in the engagement ring)? Or does this mean my engagement ring is not platinum as I'd always believed (and as stated in the paperwork)?

Answer
Some platinum is made with cobalt as an alloy metal instead of iridium or ruthenium.  Cobalt will definitely make the metal attracted to a strong magnet and the platinum metal may attract small ferrous particles.  Other platinum jewelry alloys are NOT magnetic    Cobalt/plat is magnetic, others are not.  This is a pain for jewelers since care must be taken not to allow any steel particles from tools, etc., to be on the metal when it is  welded. Ferrous metal that hot will contaminate the platinum.

Your ring is most likely what it says it is.  A jeweler can test it to alleviate any deep concerns.

Cobalt/platinum is magnetic but not strongly so.
Get back if you need more answered.

Blessings and peace.  Thomas.  

Jewelry, Gems, & Minerals

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Thomas

Expertise

Have a question about jewelry repair or working with precious metal jewelry and gemstones? For many years up to December 31, 2010, I was a working professional bench jeweler, involved everyday with setting stones in mountings, designing and making jewelry, repairing and limited custom manufacture. If you work with jewelry as a hobby or as a profession, I might be able to help. I deal with the retail business, not mass production. Ask privately if you wish. See the box for that: It keeps your question between us. Please DO NOT ask MAKER'S MARKS, but metal quality marks are fine to ask. Please DO NOT ask diamond prices. See a gemologist for that.

Experience

I have extensive experience in design, service and making of jewelry. I deal mostly with precious metals and gemstones but work with many materials as needed and usable to create an artistic design. My experience also includes freelance photography and photographer of jewelry and similar items for a former employer and individuals. Design of custom items requires reading the desires of the client and being clear on what can be done within that framework...then fulfilling the transition of idea to reality. Effective communications is essential in a working designer/producer and customer relationship.

Education/Credentials
Education is English/Physics! Started in human resources, to advertising, to jewelry...wow, what a road. I have had formal training in jewelry work and many shared experiences with top grade jewelers. We just never know were we will go or be. Follow your best, your dreams, with some discretion! Don't let the work tear up your body along the way as it has mine.

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