(Closed) How to remove hard water/rainbowy mystery stains on moissanite.

posted 5 years ago in Rings
Post # 17
Member
1194 posts
Bumble bee
  • Wedding: November 2015

LittleAudrey:  This thread is the best! I have this terrible smudge smack in the middle of the table and it drives me insane! I will try the silver polish and C&C cloth. Thanks for all the good info! I was almost ready to consider getting a different stone (like an Amora) but I don’t want to since it’s the one he proposed with. Thanks again ladies!

Post # 19
Member
254 posts
Helper bee
  • Wedding: September 2016

I managed to capture the stains (although the picture quality is terrible). It only shows on a few facets here (bottom left) but it’s on every single one, including the table. This is after cleaning with water+soap, toothpaste, degreaser, window cleaner, rubbing with a soft cloth, vinegar, …

Post # 20
Hostess
9754 posts
Buzzing Beekeeper
  • Wedding: March 2014 - Chicago, IL

perlerose:  I have the same problem on all the little facets and the table. The table is what I got “rid of” with Invisible Glass, but it’s slowly coming back. It’s really hard to capture with my cell phone camera, but I did my best.

 

Post # 21
Member
277 posts
Helper bee
  • Wedding: June 2016

perlerose:  Thanks for posting a visual. How long have you had your moissanite? When did the “oil slick” start appearing?

Post # 22
Hostess
9754 posts
Buzzing Beekeeper
  • Wedding: March 2014 - Chicago, IL

I was trying to post a pic of the spot coming back on the table and it glitched out. Here it is…

I’ve had my moissy 1 year and 1 month. The spot appeared about 4-6 months after I got it. That’s why I think it’s surface oxidation and not some polishing glue as they claim.

Post # 23
Member
1120 posts
Bumble bee
  • Wedding: March 2014

FutureDrAtkins:  Silicon carbide is naturally oxidation resistant. It’s most likely caused by a build up of mineral deposits in the local tap water as well as bodily oils and soap. My mom’s diamonds get the same filmy build up.

Post # 24
Member
254 posts
Helper bee
  • Wedding: September 2016

oriskany:  It was bought in february but I didn’t actually wear it until late march 2014. I started noticing the film in august-september.

Post # 25
Hostess
9754 posts
Buzzing Beekeeper
  • Wedding: March 2014 - Chicago, IL

Trilly:  Interesting, thanks. I’ll have to read up on it.

Post # 26
Hostess
9754 posts
Buzzing Beekeeper
  • Wedding: March 2014 - Chicago, IL

Trilly:  Well I’m reading up on some semiconductor journal articles. One in particular states:  “Initial oxygen deposition takes place below the surface, away from Si dangling bonds, close from the carbon plane with oxygen atom in Si-O-Si bridge bonded sites. The oxidation of a pre-deposited thin Si overlayer onto the 6H-SiC(0001) 3 3 surface leads to an abrupt SiO2/SiC interface formation.” 

And also, “For all polytypes, direct SiO2/SiC interface formation is achieved already at room temperature and extremely low oxygen exposures. However, the two 6H- and 4H-polytypes have significantly different behaviors with larger amounts of oxide products having higher oxidation states for the 6H-SiC(0001) 3 3 surface, while mixed oxides including carbon species (Si-O-C) are the dominant oxide products for the 4H polytype surface.” 

Post # 27
Member
5221 posts
Bee Keeper

Hmmm…..that is kind of a bummer that moissanite can develop this issue. How long does it take to come back once the stain is removed?

ETA: despite this issue, I really the OEC cut you guys have posted. I hope this issue doesn’t ruin the stone for you all, because it really is breathtaking!

  • This reply was modified 5 years, 2 months ago by  Bridey77.
Post # 28
Hostess
9754 posts
Buzzing Beekeeper
  • Wedding: March 2014 - Chicago, IL

Bridey77:  I still think the stone is gorgeous. If I can permanently or at least semi-permanently get the stain to go away, I’ll be happy. I really love it for what it is, especially its sparkle. I’m just feeling frustrated at the moment. 

Post # 29
Member
2564 posts
Sugar bee
  • Wedding: October 2014

This is really weird, I’ve had my moissanite for two years and it has never had anything like this.  I wonder if only certain cuts are prone to this build up?

Post # 30
Member
133 posts
Blushing bee
  • Wedding: July 2006

LittleAudrey:  lol I’m the one who wrote baking soda tooth paste and electric tooth brush. It works!

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