Keeping abreast of gemological developments, even for those who have chosen to make gemology their profession, is challenging. Apart from the accurate identification of all gemstone species and varieties, from the relatively common to the extraordinarily rare, and even with the ever presence of synthetic equivalents; today it is the identification of treatments being applied to gemstones that present the greatest challenges.

All of the popular gemstones and pearls have treatment identification challenges; examples include the HPHT treatment of diamond both to remove and add color; the filling of fractures (in diamond, ruby, emerald, tourmaline etc.) with glass, resins or oils to hide the fractures and improve clarity; the irradiation of various gems (topaz, diamond, tourmaline, cultured pearls, etc) to change their color; the coating of gems (topaz, diamond, pearl etc) to add color, effects or improve durability; the heating of gemstones (aquamarine, tourmaline, ruby, sapphire, spinel etc) to improve color and/or clarity; and the diffusion of foreign elements into stones (ruby and sapphire) to change color.

These and other treatment challenges emphasize the need for well equipped and professionally staffed laboratories such as the GIA Laboratory, Bangkok. Only through their professionalism and independence can all involved in the purchase and sale of gemstones function with confidence allowing the final consumer to focus without concern on the joys associated with the possession of rare and beautiful gemstones.

In conjunction with the GIA Laboratories in New York, Carslbad (California), Tokyo and Hong Kong, the GIA Laboratory in Thailand undertakes a considerable number of research projects throughout the year while at the same time providing the Report and Consultancy Services shown to the left in order to assist all those involved in the sale and purchase of gemstones and pearls.

LABORATORY

colored stone services

___________________________

On this page you will find information about the various GIA colored stone 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 colored stones submitted to the GIA Laboratory in Bangkok, please choose the Thai Baht currency pdf in the Colored Stone folder:

PAYMENTS POLICY
READ MORE ABOUT COLORED STONE SERVICES

IDENTIFICATION REPORTS

Identification reports professionally document the results of a full examination of a gemstone. The results detailed will identify the gem examined giving such identifying characteristics as: color, transparency, shape, cut, dimensions and weight. A color photo of the stone or item is included in every report. The full report will also state whether a gemstone is natural or synthetic and if it has been treated to enhance its appearance by an identifiable treatment. It will also be noted if it is a simulant with no known natural counterpart, or if it has been assembled from two or more separate components.

IDENTIFICATION + ORIGIN REPORTS

01-Emerald-OriginOrigin reports are available for ruby, sapphire, emerald and Paraiba tourmaline. These reports give all of the details normally included in the “Identification Reports”, as well as a scientific and experience based professional opinion on the geographic origin of the stone examinated.

QUALITY ASSURANCE REPORTS

Pearl-Identification-reportQuality Assurance Reports (QARs) are communicated in a spreadsheet style report and detail only the specific information requested by clients. While the identity is always given, where possible, sorting on environment, treatments, luster, nacre thickness (bead cultured pearls only) and surface are available.

PORTRAIT REPORTS

Sets out all the supporting data that underlies the conclusions reached in an Identification or Identification & Origin Report. This multiple report is delivered enclosed in its own attractive hard folder. This report is available upon request.

MONOGRAPH REPORTS

The Monograph Report augments the data of a GIA report by documenting the full identification and origin determination process, as well as the gemstone’s historical provenance. Complete with photographs, spectroscopic illustrations, and supporting reference documents, when available, this presentation-quality, hand-bound book resides in a custom slipcase along with the gemstone’s Identification & Origin Report. Service offered on qualifying gemstones only.

GEMPASSBOOK™

Gempass_bookSave on identification and origin services by purchasing booklets of prepaid vouchers. GemPasses must be presented at time of submission and may be redeemed at any GIA laboratory location. GemPasses do not expire and may not be used for Express Service.

LABORATORY

pearl services

___________________________

On this page you will find information about the various GIA pearl 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 pearls submitted to the GIA Laboratory in Bangkok, please choose the Thai Baht currency pdf in the Pearl folder:

PAYMENTS POLICY
READ MORE ABOUT PEARL SERVICES

IDENTIFICATION REPORTS

Pearl-Identification-report

READ MORE

Pearl Identification Reports (PIDT) are available on all types of pearls whether loose, strung or mounted (latter when possible). The report provides information on the identity, environment, mollusk (when possible), any treatments applied (if Detected), shape, color and overtone. The weight and measurements are also shown.

CLASSIFICATION REPORTS

Pearl-Classification-report

READ MORE

Pearl Classification Reports (PR) are available on nacreous untreated pearls whether loose, strung or mounted (latter when possible). The report provides the same information as the PIDT report with additional information on the luster, surface and matching (latter only
for 2 or more pearls).

QUALITY ASSURANCE REPORTS

GIA_QAQuality Assurance Reports (QARs) are communicated in a spreadsheet style report and detail only the specific information requested by clients. While the identity is always given, where possible, sorting on environment, treatments, luster, nacre thickness (bead cultured pearls only) and surface are available.

PORTRAIT REPORTS

Sets out all the supporting data that underlies the conclusions reached in an Identification or Classification Report. This multiple report is delivered enclosed in its own attractive hard folder. This report is available upon request.

MONOGRAPH REPORTS

The Monograph Report augments the data of a GIA report by documenting the full identification or classification process, as well as the historical provenance of the pearl(s). Complete with photographs, spectroscopic illustrations, and supporting reference documents, when available, this presentation-quality, hand-bound book resides in a custom slipcase along with the pearl’s Identification or Classification Report. Service offered on qualifying pearls only.

LABORATORY

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:

Our services are set out along with the applicable fees.

If you require a service that is not listed below either call +66 (0)2 779 6100 or describe your needs in an e-mail addressed to giabkklab@gia.edu.

SERVICE FEE SCHEDULE
READ MORE ABOUT COLORED DIAMOND SERVICES
READ MORE ABOUT SYNTHETIC DIAMOND SERVICES

HOW GIA GRADES YOUR DIAMOND?

READ MORE

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.

  • Anonymity
  • Weights and Measures
  • Grading Color
  • Grading Clarity and Finish
  • Grading Cut
  • Inspection, Care and Handling Procedures
  • Inventory Control and Routing

EXAMPLE OF GIA DIAMOND GRADING REPORT

Diamond_report-sample

INFORMATION ABOUT THE GIA 4Cs (Color, Clarity, Cut and Carat weight)

Download GIA 4Cs Brochure

Color

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.

Clarity

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.

GIA Clarity Scale

Cut

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.

Carat Weight

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.

WONDER OF NATURE

diamond_08There 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.

TREASURE OF TIME

diamond_10Every 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.

Report check

GIA reports represent the highest standard of reliability, consistency and integrity. And now, GIA Report Check is available for all GIA reports, providing you with an additional level of assurance. With Report Check, you can quickly and conveniently confirm that the information on your report matches what is archived in the GIA report database.

Click here to check your report

On-site gemological consultancy services

If requested, visits can be prearranged by GIA gemologists to business offices or the homes of individuals who require gemological advice. This advice will be gemological in nature but may or may not involve the examination of actual stones. All advice given is verbal, however written reports may be available upon request at additional cost. Written reports will be then produced within one week of the visit upon authorization

On-site-ruby-02 On-site-Pearl_04

On-site lab services during trade shows

Gemologists from the GIA regularly travel to international trade shows like Tucson, Las Vegas, Hong Kong, Basel and Facet in Sri Lanka to provide convenient on site services to the trade.
Our mobile laboratory will be presented at the following trade shows such as Las Vegas, Hong Kong, Sri Lanka, Bangkok.

These services are set out below along with the applicable fees.

If you require a service that is not listed here please either call +66 (0)2 779 6100 or describe your needs in an e-mail addressed to giabkklab@gia.edu.

Facets_SriLanka01 onsite_Basel2015

FeeAndPayment

Return dates

The link below go to the dates by which diamonds and gemstones submitted to GIA laboratories this week will be ready for pickup or shipment with their accompanying reports. Secondary services and transit times are not factored into the date.

Return dates are updated weekly and represent GIA’s best estimate for items submitted in the current week.

GIA Return dates
The GIA Laboratory Bangkok facility is located on the 10th floor of the U-Chu-Liang building in central Bangkok, Thailand (see map). It is state of the art in every respect. Goods, personnel and clients are protected by very high levels of security. Staff training and experience is amongst the best in the world and equipment specifications are equal to the world’s finest gemological facilities. Office Hours: 10.00 a.m. – 5.00 p.m. (Mon-Fri)