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Replies: 20 / Views: 3,696 |
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Pillar of the Community
United States
8715 Posts |
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Rest in Peace
10197 Posts |
Black is generally the final stage of coin metal degradation, the natural process of metal oxidation, or in plain English, decay. At least you know it won't be getting any worse!
True, "rainbow" or multi-hued toning ate nothing more than stages of the natural downward cycle. You may be able to retard the progressive effect, for a time by sealing, chemical treatments, but onward metal corrosion marches.
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Bedrock of the Community
United States
94367 Posts |
I would say that black is usually not a good sign, but how about some pics?  to the CCF!
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Bedrock of the Community
United States
75050 Posts |
If you can post a picture, that would be great.
Errers and Varietys.
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Pillar of the Community
United States
3402 Posts |
Pics would be great...I myself do note find the black toned silver coins attractive. TPGs seem to ignore the black and just grade it on the details.
KK
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Pillar of the Community
United States
4333 Posts |
Hi, welcome!
When I listen to LED ZEPPELIN...so do my neighbors... Roll hunting since '77 Dirt fishing since '72
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Bedrock of the Community
United States
17884 Posts |
If it is going straight to black to was probably dipped and improperly rinsed before slabbing and the dip traces are now attacking the coin inside the holder. Unfortunately neither of the two major services guarantees will compensate you for a coin that "turns bad" after it was slabed.
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Bedrock of the Community
United States
20753 Posts |
 If it's in a slab, that is odd that it is turning black. Mlust have had something on it before slabbing.
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New Member
 36 Posts |
I was leaning more to a breach in the hermetic seal on the slab. Sorry I couldn't locate the 25c tonite but on another hand I have almost a full NGC box of graded 5c that are all toning a golden color not unlike a Sache Dollar. Never heard of this either. The nicks are all proofs and no its not the camera...any ideas  
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Bedrock of the Community
United States
17884 Posts |
Were they toned when they were slabbed? The early 60's proof sets were known for nickels that toned gold or blue in the sets. Those toned nickels were very popular and sometime brought good money. Slabbing them would not be too much of a surprise.
And what generation NGC holder are they? The old "no line" fatties were known for the paper label sometimes causing toning of the coins. Although usually such toning was directional with the toning being greatest at the point of the coin closest to the label.
Edited by Conder101 09/05/2018 08:32 am
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New Member
 36 Posts |
Hi Gary, about those golden 1964 5c,I bought them quite a few years ago already graded. I knew my stuff back then so I would think I would have questioned a purchase of gold nicks. They were all sequentially graded and shy of cracking one I can see everything but the outer rim with my 60x. Everything is the EXACT same color and tint including the mirror field right down to every letter and number. Do I have 20 gold colored, covered, plated or just perfectly even toned 64's? I'm not a big NGC guy so not positive about the fattie. It has a reeded edge and won't go in a blue PCGS box at all but does fit the silver NGC boxes. Also has the 2" long hologram. Man I put all of my coins in the bank for decades and just recently retrieved them to market out. Kinda difficult when you don't know exactly what you have. I tend to go with possible paper discoloration except that they are all evenly toned(?) and no sign of bleeding out onto the slab. Am I a zillionaire or an idiot? You would think if they were gold pre-slabbed that NGC would have noted that on the label.Here's a # if you want to look it up 314489-027.I know my coppers like the back of my hand, likewise my goldies but this one has got me bedazzled. Hopefully someone might see this post and know right off. Until I know, I will not be able sell them to my regulars without being able to answer any and every question. That's my form of personal customer service and client retention. Plus I have to be able to sleep at night. I hope to be able to sell them soon as I am liquidating my entire 3 generation collection to supplement my retirement since Reaganomics practically wiped me out. I don't know how to cross post or even what other category to move it to to get a few more opinions. Any help would be cool.1 more quicky,how do you crack an Ncg or Igc slab without harming the coin. In my day cracking out was not considered kosher, so I have never done it before. I really have a boatload of IGC stuff that looks to me to be undergraded. Plus I can hardly get 9 bucks for a 64 red ms67 1cIGC where the same grade in PCGS is $17,500? Thanks a bunch
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Moderator
 United States
14463 Posts |
I was trying to lookup the NGC slab, but they also require the grade when selectingEDIT - nevermind I found it, but it doesn't show a picture 
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New Member
 36 Posts |
so Fuzz what's your take on 20 identical golden 5c graded one after the other? I found a very short forum discussion about this and the conscientious was toning but 20 toned slabs exactly alike? Interesting I posted some pics on page 1. THX
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Moderator
 United States
14463 Posts |
I believe slabs are not air-tight. Toning in a slab could be caused by fumes that came from the paper insert (out-gassing) or by the air from where the slabs are stored. Coins that are placed in folders sometimes develop differences in toning on each side. In the past, Whitman folders were notorious for having the glue out-gas and cause coins to tone.
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New Member
 36 Posts |
I ask a relatively precise to the point question to NGC and received this answer Max Spiegel said: Mike,
Thanks for the question. While NGC holders are virtually airtight (and watertight), there can be some variance between individual slabs.
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