Instructions for JJ

[leopardprey]

http://igsdiamonds.com/loupe-howto.php (with photos)

HOW TO USE A LOUPE
The Zeiss 10X Jeweler's Loupe is one of the finest hand-held optical devices made. To maximize its effectiveness, here are a few hints:
1. Hold the loupe close to your eye.

You must realize that a lens that magnifies ten times has a fairly short focal length so it will be used only an inch or so from the eye. Don’t be afraid to get the loupe close to your eye. (See photo 1)

2. Keep your head up and both eyes open.

Keep your head erect and don’t bend your head over. Keeping your head erect will keep light on your subject; bending over shields light from the subject with your shadow. (See photo 2)

3. Brace the hand holding the loupe.

Brace the hand holding the loupe with the hand holding the object to provide stability and avoid shaking. (See photo 3)

IMPORTANT – Keep both eyes open! It works. Keeping one eye closed will soon cause discomfort in the muscles that close the eye and lead to a twitch.


And


Do you know how to properly use a Loupe?
A Loupe (correctly pronounced loop) put simply, is a small magnifying glass.

A loupe has many uses, you should think of it as an essential tool for owners of all fine jewelry. It should not be limited to use only when purchasing a high quality diamond or wedding ring.

With a loupe you can check for cracks in the stones of your jewelry.

You can examine the shanks and settings of your jewelry to make sure that you are not going to loose a precious stone from your setting.

You can look for inclusions that will help you to assess the value of the stone.

What to look for in a good quality loupe:
The number of lenses:

One lens: Loupes made with a single lens are generally of lesser quality, they will cause a distortion of the object you are magnifying.

Three lenses: A triplet loupe is a magnifier that contains three lenses placed together in such a way that distortion and color problems are corrected.

Understanding the X rating:

Loupes are labeled with a number, followed by the symbol X.
Think of it this way, X = times. For example, a 2X loupe makes objects appear two times their actual size and a 5X is five times the actual size of the object.

Overall:
The best loupe for jewelry:

A 10X triplet loupe. Always purchase one with a black frame to eliminate distortion caused by light reflecting from the inside sides of the loupe.

The FTC in the United States requires that stone grading must be done under than 10X magnification.
The FTC standard states that any flaws that do not show up under 10X magnification are considered nonexistent for jewelry grading purposes.

30X loupes:
While bigger often seems better:
30X loupes are far too powerful for any person who is not extremely experienced in their use.

A 10X is sufficient to easily examine inclusions and fissures in gemstones and their use is relatively easy to learn.

How to use your new loupe:

Technique:
Most important, practice, practice, practice.

First: Hold the loupe between the thumb and forefinger of either hand.

Second: Hold the gemstone or piece of jewelry in the other hand.

Third: Bring both pieces very close to the eye you cannot see tiny flaws at a distance.
If you wear glasses, do not remove them.
You should keep the loupe approximately one inch (more or less) from the eye, and the object you are examining should be approximately one inch from the loupe.
Move the loupe in and out in very tiny increments until you have the object clearly focused.
You are now free to rotate the object, and look for flaws.

Note:
It is usually good to brace your elbows on a table or flat stable surface when viewing gemstones. A steady hand is most likely to find the flaws that a shaky hand may overlook.

Things you should consider before purchasing a gemstone.
Your loupe can be of great importance here:

Symmetry is the stone balanced?

Is there the correct number of facets for this particular cut?
How is the sharpness of the facet edges?
Hard stones should have sharp edges most synthetic stones will have softer edges and will appear more rounded when viewing through a loupe.

How is the over all proportion of the gemstone?
Are there inclusions, flaws, or bubbles in the gemstone?
Inclusions in colored gemstones are not necessarily a bad thing they can provide positive identification that the stone is a genuine rather than a synthetic stone.
Flaws in colored gemstones usually do not reduce the value of the gem.

Bubbles are generally a sign of a synthetic gemstone, and you can learn quite quickly how to spot these flaws.

Are there chips or scratches or cracks in the gemstone?
Brittle stones tend to chip and crack more when they are placed into a setting, while soft stones often scratch easily.
Be sure to check at the prongs of the setting to check for chips and scratches that may have occurred at the time of setting.

So as you can see, the loupe can be a valuable tool in helping you locate that special piece of jewelry that is sure to become a family heirloom!


:dumm y:

[SPACE-DWELLER]

DOH!

[JJ Irani]

Tosser!!

[Andad]

Just like listening to one of my ex-wives.

[JJ Irani]

Originally Posted by directioneng

Just like listening to one of my ex-wives.

How many ex-wives did you have, Eddie?

[Alcan]

Originally Posted by JJ Irani

How many ex-wives did you have, Eddie?

Not Eddie, but 3 here. I've been voted Benefactor of the Year for the Law Society of Upper Canada twice.

[Flyjet601]

Originally Posted by Alcan

Not Eddie, but 3 here. I've been voted Benefactor of the Year for the Law Society of Upper Canada twice.