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GIA Research (Thaland) - Services
Colored Stone Report
Pearl Report
Diamond Report
 
GIA Laboratory, Bangkok

10th Floor U-Chu-Liang Building
968 Rama IV Road Silom Bangrak Bangkok
10500 Thailand

Tel: (66) 2 632 4090
Fax: (66) 2 632 4096
Email: giabkklab@gia.edu

Office Hours:
10.00 a.m. - 5.00 p.m. (Mon-Fri)
 

Welcome to
GIA Laboratory Bangkok diamond services!

On this page you will find information about the various GIA diamond reports.

FEES SCHEDULE and PAYMENTS: If you are searching for information about our current policies, please follow the links and study the price list and payment policy on the www.gia.edu website. As a general policy, GIA report fees are charged in the currency of the location where the item is submitted for service. Therefore for diamonds submitted to the GIA Laboratory in Bangkok, please choose the Thai Baht currency pdf in the Diamond folder:

   
 
 

Click to download our

"DIAMOND SERVICES FEE SCHEDULE"

   
 
 

Click to read our

PAYMENTS POLICY
   
  Our services are set out along with the applicable fees. If you require a service that is not listed below either call +66 (0)2 632 4090 or describe your needs in an e-mail addressed to giabkklab@gia.edu.
   

HOW GIA GRADES YOUR DIAMOND?
People from all over the world send their diamonds to the GIA Laboratory for grading and analysis. Our clients put their business in our hands and their trust in our expertise – and we are extremely careful with both.
   

CLICK TO ENLARGE
EXAMPLE OF GIA DIAMOND GRADING REPORT
 
  INFORMATION ABOUT THE GIA 4Cs (Color, Clarity, Cut and Carat weight)
   
  The GIA Color Scale extends from D (colorless) to Z (light yellow or brown).
Although many people think of gem quality diamonds as colorless, truly colorless diamonds are actually very rare. Most diamonds used in jewelry are nearly colorless with tints of yellow or brown.


Color grades are determined by comparing each diamond to a master set. Each letter grade represents a range of color and is a measure of how noticeable a color is.

Fluorescence Some diamonds can emit a visible light when exposed to ultraviolet radiation, but fluorescence is not a factor in determining color or clarity grades. However, a description of its strength and color is provided on GIA Reports as an additional identifying characteristic.
  The GIA Clarity Scale includes eleven clarity grades ranging from Flawless to I3.
Because diamonds form under tremendous heat and pressure, it is extremely rare to find a diamond that lacks any internal and external characteristics. These characteristics are a by product of its formation and help gemologists separate natural diamonds from synthetics and simulants, and identify individual stones.
  The GIA Cut Scale ranges from Excellent to Poor. GIA provides a cut quality grade for standard round brilliant diamonds that fall in the GIA D-to-Z color range.

A polished diamond’s beauty lies in its complex relationship with light: how light strikes the surface, how much enters the diamond, and how, and in what form light returns to your eyes.

The result is a magnificent display of three attributes.
Brightness is the combination of all white light reflecting from the surface and interior of a diamond.

Fire describes the “flares” of color emitted from a diamond.
Scintillation describes the flashes of light you see when the diamond, the light, or the observer moves.



A polished diamond’s proportions affect its light performance, which in turn affects its beauty and overall appeal. Diamonds with fine proportions, symmetry, and polish optimize their interaction with light, and have increased brightness, fire, and scintillation.
  One carat equals 200 milligrams in weight. For diamonds under one carat, each carat is divided into 100 points – similar to pennies in a dollar. 0.75 ct. = 75 points, ? ct. = 50 points.

The result is a magnificent display of three attributes.
Brightness is the combination of all white light reflecting from the surface and interior of a diamond.




BEAUTY AND ITS BEHOLDER The 4Cs provide a way to objectively compare and evaluate diamonds, but numbers alone can’t describe a diamond’s mysterious and captivating beauty – for that, you’ll have to visit your local jeweler to see one for yourself.
 
   
  INFORMATION ABOUT THE GIA 4Cs (Thai Language):
   

WONDER OF NATURE
There is no other gemstone quite like a diamond. It is found in the most remote places on earth, and the fact that it forms at all is something of a miracle. It takes about one ton of rock to recover less than half a carat of rough, making diamond one of the rarest and most desired gemstones in the world.
A diamond is a testament of endurance and strength – and not surprisingly, the ultimate symbol of love.
   

TEASURE OF TIME
Every diamond is unique. Each reflects the story of its arduous journey from deep inside the earth to a cherished object of adornment. Yet all diamonds share certain features that allow us to compare and evaluate them. These features are called the 4Cs.