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Forum Home > FAQs > The Concept of Grade

broken compass
Limited Member
Posts: 230

I see a lot of posts where people ask, how much is a 1911 Pig Rupee or how much is a 1936 1/4 Anna. But rarely do I hear someone qualifying the coin in terms of grade. Depending on the grade of the coin the coin can be worth anywhere between the price of silver to a 10's and thousands of rupees. Grade is such an important thing! So I want to take a few minutes to let everyone know my thoughts about grade.


What is Grade?

Depending on how unchanged and unscratched and uncleaned the coin has been since the time it has been minted, the coin is given a grade. There are different ways in which grades are measured. The most famous one is the Sheldon scale. It is a number from 1-70. Where 1 is barely identifiable to 70 which is a perfect coin. The probability of a coin just minted by the mint being graded 70 is one in a few thousand coins. For more information about Sheldon's grading see here.

www.coins.about.com/od/coingrading/f/sheldon_scale.htm

www.en.wikipedia.org/wiki/Coin_grading



How can I tell what grade my coins is?

It requires a lot of practice and experience but a good place to start is getting an idea how a coin in each grade will look like. Here is a link about all US coins and pictures of each coin in every grade. This will give you an idea about how each grade looks like. I use this article as a baseline for grading my coins.



Remember that a shiny coin is not always a higher grade, look for scratches and evidence of cleaning. Get a magnifying glass and notice the surface of the coin. It should not have scratches from cleaning whic is different from scratches from clashing with other coins(this is called bagmarks). See how the dust is spread across the coin. See if there is something unnatural about the coin.



Coin should never never never be cleaned. The moment it gets cleaned or even touched, the surface starts reacting with your bodily oils and starts getting destroyed. Always use a cotton glove to handle coins if you want to maintain the pristine state of the coin. Do not store the coin in any plastic cover because the plastic contains PVC that could damage the coin and make it go bad in a few years. Do not put it in water or use a toothbrush to clean it or tamarind or anything else. 

August 31, 2011 at 12:09 PM Flag Quote & Reply

kidromeo
Site Owner
Posts: 489

Excellent write up BC

--
"Coin collecting is the only hobby in the world that you can
spend all the money in the world and still have some left over" 
September 1, 2011 at 5:58 AM Flag Quote & Reply

प्रशांत जैन
Member
Posts: 141

Thanks a lot for such useful information.. :)

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My Blog - http://india-coin.blogspot.com/
◄↕→PJ←↕►

September 1, 2011 at 12:24 PM Flag Quote & Reply

broken compass
Limited Member
Posts: 230

Here's another website that I found very useful to understand how coins are graded. Its a website by PCGS that lists the same coin in different grades along with pictures. I found the website very very useful. Please take a look at some examples of coppers and silvers to understand how the same detail on an Indian coin would grade as. 


http://www.pcgs.com/photograde/

February 4, 2012 at 12:12 PM Flag Quote & Reply

daddu
Limited Member
Posts: 39

some body tell me why we should not clean coin although those coins are getting dull as day by day?2what is the actual reason?one another quetion i have seen a coin in utube vedio acoin pulling rice what is that a magic?last que how can i identify bi coins(any)is genuine or?thnking you all in advance.

July 27, 2012 at 11:23 PM Flag Quote & Reply

Aniruddha
Moderator
Posts: 222

I have some copper coins which turn green because of oxidation, shouldnt i cleant them?

July 28, 2012 at 4:14 AM Flag Quote & Reply

daddu
Limited Member
Posts: 39

aniruddha i alwys want to clean my coin unfortuntely/fortunately iread some article any sight they write there do not clean ,ialso want to know why should not clean any coin?still i am waiting for answer from anybody


July 28, 2012 at 4:41 PM Flag Quote & Reply

Aniruddha
Moderator
Posts: 222

I found the answer, everytime u clean a coin, no matter how much precaution u take, u end up scratching the coin and leave some microscopic cleaning marks on it, rather soak the coin in some cleaning solvent( the solvent shouldnt react with coin metal), soak it again in clear water for sometime, then dry it, i soaked my coins in tamarind water for sometime and in clear water, dried it, the coin was as good as new. :)

July 31, 2012 at 5:49 AM Flag Quote & Reply

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