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topic 30998

Why not solid rhodium ring?


A discussion started in 2004 but continuing through 2018

2004

Q. I am a jewelry hobbyist and am just wondering, if rhodium is used to plate jewelry and has such a nice finish why not just use solid rhodium for a ring? It seems it would be a good compromise between platinum and white gold. Is there some durability issue with rhodium?

Michael Smith
technician - Mountain View, California


2004

A. The cost of precious metals, especially rhodium, fluctuates wildly, but it's probably fair to say it's currently about 10x the cost of 24 carat gold, or 20x the cost of 12 carat gold. Still interested?

I understand that it's also hard to work rhodium and it has a very high melting point.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey


2005

Q. So, Rhodium costs almost twice as much as Platinum - of course I am interested. Where can I get solid rhodium jewelry, and if I can't, why not?

Along the same lines, why not solid Palladium jewelry? (Much more expensive than silver, but only costs about as much as 10k gold).

Sruli Federman
- Brooklyn, New York


2005

A. Solid palladium jewelry is what I have been making for the last 2 1/2 years, and it works beautifully. I weighs a lot less than platinum so you get more rings made per oz. It is actually a bit whiter than platinum, and is much nicer to work in than white gold. You can get palladium alloys for jewelry applications from Hoover and Strong.

Elichai Fowler
- Livingston, Montana


2005

Q. I am also hoping to find rings of pure rhodium as well as ruthenium. Do they exist? Could they?

Mordechai Xiaohiu
- Marietta, Georgia


2005

A. Rhodium costs Price 1g= $70,10g= $490 , 60g= $2,195.
Iridium costs Price: 1g $35, 5g $145, 10g $245
Platinum costs Price: 1g $55, 2.5g $105, 5g $195

Rhodium is The most expensive natural metal. It is used in plating silver jewelry. I haven't found solid jewelry made from rhodium. It's hard to start a new trend when it's this expensive. The only idea I have on obtaining a pure rhodium necklace or bracelet is to buy the metal from a elemental supplier for chemistry sets and then pay a jeweler to make me a custom piece for me. Maybe have an iridium, rhodium, platinum alloy blend. Ratio of 5/80/15 respectively. What is your ideal jewelry metal alloy combo? I guess I should also find the melting points for these metals and density. Can they be combined for an alloy?

Jaron Krane
- Boca Raton, Florida


2005

A. Hello All
Just to let you know I have made 2 wedding bands in 80% solid Rhodium. You have to add 20% Plat as Rhodium will break if used in its pure form; it's not malleable.
What a fantastic metal. The problem is you can only get the metal in powder form, so you have to be very careful when you place the metal into an induction smelter.

Neil Garnett
- London, U.K.



Why don't rich people buy rhodium rings?

2007

Q. If these alloys in jewelry so expensive then why are they not made privately for richer people already? And does anyone know under what condition these elements can be found?

Sophie Louise Denton
- Norwich, England, United Kingdom


2007

A. Hi Sophie. Just because it's expensive doesn't make it good, nor mean that people are highly desirous of having it :-)

One strike against rhodium is price volatility: it doesn't have it's own supply & demand price like most other things. Rather, rhodium is so rare that it's available only as a byproduct from platinum mining and refining; so when the demand for platinum is high, there is a good amount of rhodium available and it costs a little less than gold. But when the demand for platinum drops and little is mined, the price of rhodium skyrockets because there simply isn't any available. Recently it was over $12,000 an ounce when gold was well under $1,000. Not even rich people want to pay 20 times as much for a ring, and then find in a few years that the price of rhodium tanked and it's worth less than a gold ring and they lost 95% of their investment :-)

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey



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2007

Rhodium is very toxic and radioactive! [No, it's not, folks]

!! If you do the research, Pure Rhodium can stain skin badly and is very toxic. Research the chemical makeup.

Google: pure rhodium

Megan Von Hoisnter
- Rialto, California


2007

A. I wasn't able to easily find the page you were reading, Megan, but I think you've accidentally extracted this a little bit out of context. The great majority of "white gold" jewelry today is plated with pure rhodium. It's worn by hundreds of millions of people and it doesn't stain the skin and is very inert.

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey


2007

A. From Wikipedia:

Rhodium metal is, as a noble metal, inert.

However, when rhodium is chemically bound, it is reactive. Rhodium compounds are not often encountered by most people and should be considered to be highly toxic and carcinogenic [citation needed]. Lethal intake (LD50) for rats is 12.6 mg/kg of rhodium chloride (RhCl3) [citation needed]. Rhodium compounds can stain human skin very strongly. The element plays no biological role in humans. However, if used plainly, without compounds, the metal is harmless.

Joseph Lunsford
- Miami, Florida


2007

A. Rhodium chloride does not appear to be especially toxic:

Rhodium Chloride:
Rat, oral: LD50 = 1302 mg/kg
Rhodium: No acute toxicity data found.

source: NIST website

J Mac
- Santa Barbara, California


The editor's fave "coffee table book" for years now...
The Elements
from Abe Books

or

November 13, 2008

!! Beware! Rhodium is highly toxic and extremely radioactive.

J.C. Beckman
Artist - Vancouver Washington


November 14, 2008

Hi, J.C. Thanks for joining in, but that absolutely isn't true at all. There are probably a hundred million women wearing rhodium plated rings. I'll bet you're thinking of Radium =>

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey



2007

Q. I'm interested in rhodium plated jewelry's allergenic or non-allergenic properties. I have met several people who can only wear 14k gold or better. How would they fare with rhodium plated jewelry on the average? Is it less allergenic than pure silver? More? Is it comparable to niobium?
Your answers would be of great interest. Thanks.

P Casey Willson
- Eufaula, Alabama


2007

Q. I am thinking of making custom wedding bands for my fiancee and I. The base of the ring is made in silver that has a center trough, and the inside of the trough would be a turks head of niobium, iridium, and rhodium. Not too sure about how well this will play out, and also looking for a fourth metal, hopefully as rare as can be, to add to the turks head.
My main issue is I am unfamiliar with how difficult a rhodium wire is to braid.

Adam Lenrow
- Newport News, Virginia


2007

Q. After 13 years I am starting to blister from my wedding rings, they are 14k gold and my doctor said I might be allergic to nickel and/or gold now. I have had them cleaned so I know it is not from anything trapped in my rings. Can I replate them with something and if so what do I use? Someone please help I don't want to plate them with the wrong metal and find out that I am allergic to it too......

Karen O'Neal
Home owner - Salem, Oregon


January 17, 2008

A. I have worked with rhodium (both metal and compounds) for many years. Rhodium is used in many applications outside of the plating and jewelry industry. Check your catalytic converter in your car and you'll usually find platinum, palladium and some rhodium.

The metal itself shouldn't be a problem except if you inhale the dust and then the problem is dust not the rhodium metal. The compounds and solutions of rhodium that are typically found in the marketplace (i.e. chloride, nitrate, Wilkinson's catalyst, sulfate, phosphate, etc.) also should pose no significant dangers except for the pH of some of the solutions.

Eric Frueh
- South Plainfield, New Jersey


June 22, 2008

A. I, too, was VERY interested in solid Rhodium rings. After doing much research and talking with many jewelers, I found out why it is almost impossible to make one:
Least of all is the cost - about 10X solid gold.
Most important is the very high melting point and poor malleability.
What this means is, the melting point is so high that it would be almost impossible to spin it into a cast for a ring before it would start to solidify. It would end up as a partial ring glob. Rhodium is ~1000 deg. higher melting point than Platinum and Platinum is very hard to cast.
The other method is to melt the rhodium into a thin flat long rectangle and bend it into a curve (a ring) and solder it shut with white gold. The only problem is the poor malleability which means it would crack and break as it is being bent because it is too brittle.

That is why I gave up trying to get a solid Rhodium ring made. The guy from London may have a point that if 20% Platinum is used, it may be malleable enough to make a ring. I suspect a jeweler would charge up to $10,000 USD to make one.

Brad Viets
- Boise, Idaho



Obama's rhodium ring

December 2, 2008

thumbs up sign I guess after today's news, everyone has heard of rhodium jewelry. B.Hussein Obama's $30,000 rhodium and diamond ring for his woman.

Ann Jac
- Bixly, Missouri


December 2, 2008

A. I got very interested once I started reading all this questions and responses, First I have been a jeweler for 38 years and nobody that I know of has had problems or reactions to rhodium, and I use it almost daily for plating.

Gilbert Gomez
- Phoenix, Arizona


May 6, 2009

Q. In the same web search that turned up this question, I also turned up a source for rhodium wedding rings direct from American Elements, a materials source.

I guess I can't link to the site here, but I wonder if anyone has any experience with ordering rings through this sort of source, or any other information.

The rhodium rings seem to be available at 99%-99.999% purity. I don't know what the cost is, because I wanted to ask around before I contacted them for more info.

Lisa McLean
- Queens, New York


July 2009

A. Hi, Lisa. Asking for a testimonial on the largely anonymous internet is like asking a stranger to watch your purse while you go to the restroom; it might work out fine some of the time :-)

But we've received many postings where IP addresses proved they were from shills posing as satisfied customers, and in most cases there is no way of knowing :-(

For this reason and several other reasons, sorry, we don't print testimonials.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey


July 15, 2009

Q. Hi Everyone,

I'm in a fairly well paid job and my girlfriend and I have discussed the group of platinum metals as she has a reaction to nearly everything. I've started my research and looked at Rhodium but this way looks massively expensive and not possible to look at anything here in the South West of England. What is Iridium like? Its properties look very inert and is it available out in the UK For general purchase as a ring (Engagement, Wedding bands)?

Geoff Hacker
- England


Rolex Rhodium Dial

December 3, 2009

A. Re: Rhodium and Palladium jewelry, HSN not too long ago sold palladium jewelry, unfortunately I guess when those in the 'jewelry-know' found out about it, it sold out rather quickly.
I'd also like to purchase some rhodium and palladium pieces myself (price aside), and believe that if there is a 'large enough push' for these 'metals', that eventually they just might become available on a more readily available scale (with perhaps even a drop in the prices).

Jeanne Myers
- Brooklyn, New York


August 14, 2010

A. Yes Obama did get his wife a rhodium ring- this was well publicized at the time he was elected, Amy. I have a rhodium rolex watch and it is the most beautiful, stunning watch I have ever seen. When I bought it I didn't even know quite the value of rhodium but I liked the look. btw just the face is rhodium. The band is stainless steel.

lin leon
- austin, Texas


September 2, 2010

A. I read that pure iridium jewelry is the latest trend. One of the hardest metals known (doesn't scratch), doesn't oxidize (tarnish) and common acids do not affect it all. Denser (heavier) than platinum but about one third the cost per troy ounce. However the cost of a platinum ring and an identical iridium ring are about the same due to the difficulty in working with iridium. A company called American Elements sells iridium rings.

Kim Kercso
- Vancouver, BC Canada


September 18, 2010

A. Hi, I have succeeded in making beautiful rings out of solid rhodium. We will shortly begin marketing gorgeous wedding bands, engagement rings, and other styles made from 90% rhodium, 10% platinum.

I have made rings out of .999 fine rhodium, but I found that alloying it with 10% platinum results in a better, more durable product.

Eitan Cohen
- Brooklyn, New York, United States


October 5, 2010

Q. Hi guys

Have been looking for a pair of wedding bands too, and while we had nearly frozen upon Rhodium-plated white gold, we got to know that the plating wears easily and would require loads of maintenance...Now we are looking for a ring that is very durable, without being as expensive as solid Platinum + Palladium...and we don't want yellow gold :( do we have a way out!

Zumi Bhadri
- Bombay, India


November 18, 2010

A. One of the above posts made a very good point. From what I've also researched about rhodium, it is too brittle to use as a ring. VERY poor malleability, and would almost certainly crack if it were sized up or down. Even mounting a stone would probably crack the mounting itself, and hitting the ring on something that would otherwise bend gold, would probably crack your rhodium ring. I think the properties of the metal more than the price dictates why making a ring out of solid rhodium isn't common practice. I'm sure there are people out there who wouldn't bat an eye about the price if they really wanted one.

Michael Rodriguez
- Blythe, California USA


December 21, 2010

A. Rhodium is ideal for jewelry. It is highly reflective (which is why it is used to plate platinum jewelry and accent gold jewelry), it is inert, it is stronger than any of the other precious metal, and it is terribly rare and therefore desirable for value reasons. It's just taking the public a long time to come along.

john volker
- watertown, New York, usa


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