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How strong of magnification do I need to see the number inscribed on diamond?

Iwanttosparkle

Iwanttosparkle

Shiny_Rock
Joined
Apr 25, 2019
Messages
146
I would like to be able to read the AGS report number inscribed on my diamond. Would I be able to do this with a loupe? Or would it take a microscope? If I could do it with a loupe, could you please recommend me one in the strength that I would need? (Amazon would be great if at all possible, for convenience sake) Thank you!
 
20x loupe for inscriptions on the girdle.
40x needed to see Tiffany inscriptions on the crown facets (don't ask me why they do it there).
 
I think at least 20x ... also it’s good to keep in mind that the inscription is incredibly small. It took me a long time to find it the first time just because I expected it to be bigger ... it’s a lot easier now that I know what to look for.
 
10x but requires practice.
 
20x typically.

DK :))
 
I tried with 30x. I could see it but couldnt make it all out:shock:. I would definitely need a microscope or a younger pair of eyes:ugeek:!
 
For most people with normal eyesight, or a LOT of experience using a loupe, I recommend 30X. The few people I know who can do it with 10X are young or have a lot of experience using a loupe. I discovered years ago that it is much easier using a scope, but then I have one in the office.

Wink
 
As you can imagine we read A LOT of inscriptions! The size of the stone is a big variable here. The height of the girdle largely determines the font size. I find stones in the 1.50 + range typically pretty easy to read with 10x, whereas a .30ct stone definitely requires 20x.

Higher power is challenging to use because the focal range is very narrow. You have to develop a good loupe technique to steady your hand, and you need to position yourself properly with a good light source.
 
Texas Leaguer said:
You have to develop a good loupe technique to steady your hand, and you need to position yourself properly with a good light source.
Click to expand...
Great point Bryan!
The part about having a goog light source is super important. You'll need to position the diamond so that the light hits the inscription at the right angle. Also a good point about stone and girdle size. Also the shape and cutting style.
Sometimes I can see the number reflected on a facet through the table on OMB or Cushion Brilliant stones!
 
Texas Leaguer said:
As you can imagine we read A LOT of inscriptions! The size of the stone is a big variable here. The height of the girdle largely determines the font size. I find stones in the 1.50 + range typically pretty easy to read with 10x, whereas a .30ct stone definitely requires 20x.

Higher power is challenging to use because the focal range is very narrow. You have to develop a good loupe technique to steady your hand, and you need to position yourself properly with a good light source.
Click to expand...

This makes me laugh because of what I did......when I first got my .44 Fancy Intense Green Yellow, I could easily read the inscription with a 10X and kept thinking "my eyes aren't that great. How bad are everyone else's that keeps recommending a 20X or 30X?" Well, I took it in to be set in a ring, and when I got it back, I could see that the inscription was there, with a 10X, but couldn't begin to read it. I hadn't paid any attention to the fact that the inscription was black when I got it, but the coloring had been cleaned off. :oops:
 
Demon said:
This makes me laugh because of what I did......when I first got my .44 Fancy Intense Green Yellow, I could easily read the inscription with a 10X and kept thinking "my eyes aren't that great. How bad are everyone else's that keeps recommending a 20X or 30X?" Well, I took it in to be set in a ring, and when I got it back, I could see that the inscription was there, with a 10X, but couldn't begin to read it. I hadn't paid any attention to the fact that the inscription was black when I got it, but the coloring had been cleaned off. :oops:
Click to expand...
Yes, that's another good point. A newly inscribed stone will have some vaporized carbon imbedded in the inscription making it like a bolded font. After a good cleaning it will be removed, leaving only the etched letters/numbers with much less contrast. It then becomes even more important to position the light at an angle that allows the inscription to be seen in relief.
 
I would use minimum 20x loupe, but as magnification goes up, field depth goes down so you will need to get up real close. Microscope would be my preferred option.
 
I have a 40 X Magnifier and I’m having troubles do I need to go up higher to a 60X
 
tysaval said:
I have a 40 X Magnifier and I’m having troubles do I need to go up higher to a 60X
Click to expand...

You do NOT need super high magnification to see inscriptions. A 10x loupe is usually sufficient, if you are practiced with a loupe. Higher power loupes are very difficult to use because of narrow depth of field. The trick is getting the loupe stabilized in your hand. Putting your elbows on a table and connecting your two hands in some way helps a lot. A microscope makes it real easy, and you can use a little higher magnification without having a problem of image stability and moving in and out of the depth of field with small movements of the hand holding the diamond.

Inscriptions are usually smaller or larger depending on the girdle thickness. So large stones are usually much easier to read than inscriptions on small stones (or stones with very thin girdles).

Also, when first inscribed the numbers/letters will be black, having some residual carbon in the inscription. The contrast makes the inscriptions easier to locate and to read. Ultrasonic and/or steam cleaning can remove the black, leaving just the white on white etching of the inscription. This makes it a bit more challenging to read.
 
Texas Leaguer said:
You do NOT need super high magnification to see inscriptions. A 10x loupe is usually sufficient, if you are practiced with a loupe. Higher power loupes are very difficult to use because of narrow depth of field. The trick is getting the loupe stabilized in your hand. Putting your elbows on a table and connecting your two hands in some way helps a lot. A microscope makes it real easy, and you can use a little higher magnification without having a problem of image stability and moving in and out of the depth of field with small movements of the hand holding the diamond.

Inscriptions are usually smaller or larger depending on the girdle thickness. So large stones are usually much easier to read than inscriptions on small stones (or stones with very thin girdles).

Also, when first inscribed the numbers/letters will be black, having some residual carbon in the inscription. The contrast makes the inscriptions easier to locate and to read. Ultrasonic and/or steam cleaning can remove the black, leaving just the white on white etching of the inscription. This makes it a bit more challenging to read.
Click to expand...

Thank you for the information. It took me a while but I found it.
 
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