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 Other Questions

 What is a CGA, MGA, etc...?

 What is a Loupe and how do I use it?

 

Question & Answer:-

 What is a CGA, MGA, etc...?

Ans:

There are several terms out there that are meant to indicate the level of experience of a stores jeweler...they are:

set up shop and sell stones.

 Jeweler:   

Anybody can call themselves a jeweler.

 Gemologist:

This is an uncontrolled title which can be used by anyone with a desire to

Graduate Gemologist (GG):

This title is awarded by the GIA to individuals who have completed a basic course in diamonds and colored stones. Once awarded, this diploma is good for life, which is an awfully long time.

 Registered Jeweler:

This title is awarded by the AGS to individuals who have extensive gemological knowledge and adhere to AGS's rigid ethical code. It must be renewed each year based on continuing education and ethical business practice.

*Certified Gemologist Appraiser (CGA):

AGS title for one who is annually tested on his/her ability to appraise gems.  Unlike a Registered Jeweler, A CGA has mastered sophisticated testing procedures.

*Master Gemologist Appraiser (MGA):

Essentially gods of the gem world.  Similar to a CGA, but to a higher degree. They only number in the hundreds in the states.

* If you deal with either of these types, you should feel confident with their ratings  and ultimately with your purchase.

 

 Ans:

A loupe is a magnifying glass used for inspecting diamonds. Good ones have 3 lenses in them and magnify 10x. To use a loupe, hold it about 1 inch from your eye and hold the diamond about 1 inch in front that. To focus, move the diamond forward of backwards. Keep both eyes open to reduce eyestrain. Once you are comfortable using the loupe, here’s what to look for. Read our Diamond Anatomy page for more details.

1.

Facet...any of the flat "sides" of the diamond.

2.

Table...On a brilliant cut (bc) stone...the top octagonal facet

3.

Girdle...The (typically ) frosty white ring at the widest part.

4.

Culet...The bottom point (actually a facet) on a brilliant cut stone

5.

Pavilion...The portion of the stone below the girdle

6.

Crown...The portion of the stone above the girdle

7.

Fire...The quality of the diamond that breaks reflected light into a colorful array.

8.

Brilliance...The quality of the diamond that reflects light without changing it (sometimes called sparkle).

9.

Fluorescence...The characteristic of some diamonds to fluoresce certain colors under some light.

10.

Natural...Usually found on the girdle. It is a small section that was on the side of the raw diamond. It appears as a slightly rough flat spot on the girdle.

11.

Feather...A jeweler’s way of saying "crack". It often appears as a white feather within the diamond.

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