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GEM SETS

We sell untreated and treated rubies-sapphires and other gems specifically selected for education purposes and for gemological research. All the gems we sell have inclusion characteristics typical for their type of treatment of great gemological interest. All our gems have been treated in our gem treatment lab in Bangkok with known parameters and they are carefully selected and properly documented to serve as control and reference samples. Our gems are suitable for these applications:
* Study specimens to satisfy the requirements for the FGA diploma examinations in gemology
* Reference sample collection for reference and study
* Leaning gem inclusions on untreated-treated ruby-sapphire
* Microphotography inclusions

We have in stock the following types of gemstones:
* Beryllium-treated sapphires
* Lead-treated rubies
* Borax-treated rubies & sapphires
* Combination treated rubies & sapphires
* Synthetic treated rubies & sapphires
* Other treated gems
* Natural untreated gems

Our gems are sold as single pieces or in set lots. Usual size per stone ranges from 0.25 ct to 3 cts. Please refer to our stock inventory below. For special orders click here.

WHY YOU SHOULD BUY THESE GEMS FROM OUR US?
Out of the hundreds of companies selling gems in the Internet, our 35-year old company is the only one that sells gems specifically for gemologists and labs for research purposes with guarantee treatment information, because they were treated in our lab in Bangkok. Buying gems from other sources, you do not actually know the exact nature of the treatment and therefore your research will be based on misinformation. Buying gems from outlets displaying opinionated and ambiguous statements issued by commercial trade laboratories stating “heat-treated and clarity enhanced with a foreign solid substance” (that could have mean lead-filled or borax-filled stones, without full disclosure transparency concealing the facts); also, we do not recognize “certificates” issued by gemological laboratories known by their deceptive business practices.

To learn more about heat-treated gemstones read the books Beryllium-Treated Rubies & Sapphires, Flux-Treated Rubies & Sapphires, Heat-Treated Rubies & Sapphires. You can also order our Gemlab reports on related issues.

NOTES:
-All gems listed for sale are subject to prior sale
-Weight and measurements are approximate
-Color is described when observed in face-up position in daylight (5500oK)
-Clarity is described as observed under 10X magnification
-Satisfaction is guaranteed. If you are not satisfy with your purchase, you can return your stones and we will refund your money (less shipping to and from Bangkok, Thailand)

WARNING: Due to US and EU ban on Burmese rubies we decline to ship to USA and European addresses. We are now investigating if we ship pink and other colored Burmese sapphires.

Lead-treated rubies
These carefully selected lead-treated rubies, also known as "pai-mai" are produced in our laboratory in Bangkok after high-temperature heating with lead, bismuth, tantalum and other additives. Most of these rubies are from Antilamena (Madagascar) and show inclusion characteristics of great gemological interest. Stones are available to 50 carats and they are priced very reasonably.

  

Beryllium-treated rubies & sapphires
 These carefully selected beryllium-treated rubies and sapphires are produced in our laboratory in Bangkok after high-temperature heating with beryllium and other additives. Most popular colors are yellow ("banana"), orange ("papaya"), and pink-orange ("mad-pad"). Other types of beryllium-treated colors are available: faceted golden-brown, preformed with very intense orange "rim", preformed with yellow/orange "rim", preformed with "blue-spot" on greenish body-color, rough pink-orange with "blue-spot", faceted light pink and faceted ruby. All above stones are from Ilakaka-Sahkara District (Madagascar), Songea (Tanzania) and elsewhere. All beryllium-treated sapphires have characteristic inclusions.

 

Rubies treated first with Beryllium, thereafter with Lead
 These rubies have been treated in our lab using the latest technology. Most of the stones emanated from Antilamena (Madagascar). They are transparent, faceted, red with distinct orange-red tinge. They are of great gemological value because of their characteristic inclusions. Stones are available to 10 carats and they priced from US$10 per carat to US$50 per carat. Contact us.

 

Borax-silica treated rubies-sapphires
These rubies-sapphires are heat-treated with borax-silica and other additives; they commonly encountered in the gem-jewelry market and have outstanding gemological value. Contact us

  
Special gemstone sets
 These sets are composed of Beryllium-treated and Pb-treated rubies-sapphires carefully selected for their inclusion characteristics of great education value for the gemologist, gemstone appraisar, student of gemology and hobbyist wishing to study gemstone inclusions. These gemstone sets are available for around $100, US$150 and US$200 range. Contact us
  
Untreated-treated reference gemstone collection
Great variety of different types of treated rubies-sapphires speficially composed for gemological laboratories, appraisers, jewerlers, students of gemology, and for research projects. Contact us.
  
ORDER – SPECIAL ORDERS
Before accepting your special order please contact us stating your exact requirements:
• Number of stones
• Average weight of each stone
• Color
• Clarity
• Special features
We will do our best to accommodate your request and inform you the related details with the exact cost before shipping.
 
   
 
 
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