Read below interesting topics on gem treatments:
Heat treatment technology
Heat treating ruby-sapphire
Beryllium detection with LIBS
Lead-filled rubies
Cranking up the heat
Treatment disclosure


OTHER GEMLAB PRODUCTS
Gemological microscopes
Gemstone sets for education

 

FOOD-FOR-THOUGHT

Our high temperature furnaces are designed to execute heating parameters provided by the operator for heat treating gems in various configuration modes. We do not sell the “know-how” technology for heating customer’s gemstones; the “know-how” technology must be developed by the end-user customer. We only sell our furnaces and related gem treatment equipment as per specifications, capabilities and limitations.
It is like selling a rice cooker: the user should know what type of rice to select, slow or fast heating-cooling, cooking temperature and time, water, and other ingredients to cook the rice as desired. It is a certain recipe, not applied to every kind of rice.
If you are novice in this subject, I suggest to read and understand my book "The Heat Treatment of Ruby & Sapphire" before thinking to buy any of the equipment offered for sale. Likewise, for the potential, but seriously dedicated end-user, I suggest to take my course #510 offered periodically in Bangkok before buying any gem treatment equipment.

DESIGNING & MAKING THE BEST GEM FURNACES IN THE INDUSTRY -from concept to reality
Based on our 37 years experience involved in the gem treatments we have concluded that the best design for heating ruby-sapphire and other gemstones is to use the vertical muffle configuration system for two important reasons:
a) to facilitate desired atmosphere conditions (or vacuum) and
b) to allow rapid/slow removal of the stones from the furnace.
These principles are implemented in our lab where the actual fabrication of these muffle furnaces takes place.Take a look in our lab.

1.Concept & simulation

2.Prototype & testing

3.Production

NEW HEAT TRATMENT SERVICE CENTER IN SRI LANKA

In May 2013, our company has opened a service center in SRI LANKA to provide technical support to our Sri Lankan customers who bought our furnaces. This new Sri Lankan company THEMELIS COMPANY (PVT) LTD is entirely owned by Ted and Angelo Themelis and it is subsidiary of our 37 year company GEMLAB which is based in Thailand and USA. Angelo Themelis, the Managing Director of the new company, is now residing in Sri Lanka providing support, installation, repair service and training for all the products we fabricate and sell. The company supplies high quality alumina crucibles, alumina muffle tubes, thermocouples, heating elements and other spare parts for all our products.
In June 2013, prospective customers will have the opportunity to view and experience personally our new furnace demonstration models M50-N-1700 and M76-N-1700.
Contact address: THEMELIS COMPANY (PVT) LTD TEL: (+94) 071-992-3131

 
Model M50N-1700: GemLab Mini Muffle High Temp. Furnace
Model M50N-1700, known as "mini-muffle" furnace, is a "light-weight", 50 mm muffle bottom loaded furnace, designed for desk top use. The furnace is suitable for heating 1,100 carats of rubies-sapphires to 1700oC actual temperature in different setup modes with/without chemical additives in full atmosphere conditions or in vacuum, with fully controllable slow or rapid cooling. This furnace is very reliable and accurate, built with the best engineering features availble to last for long time.. more... 
PRODUCTION READY FOR DELIVERY AT END OF OCTOBER 2013
Model M76N-1700: Gemlab Maxxi Muffle High Temp.Furnace
Model M76N-1700, known as "maxxi-muffle" furnace, is a medium size lab furnace providing great flexibility and performance. The furnace is suitable for heating 2,400 carats of rubies-sapphires to 1700oC actual temperature in different setup modes with/without chemical additives with/without atmosphere conditions or in vacuum, with fully controllable slow or rapid cooling. Model M76N-1700 is very reliable and accurate, built with the best engineering features not available anywhere else. more... 
PRODUCTION READY FOR DELIVERY AT END OF OCTOBER 2013
High Pressure-Low Temperature"GEM OILING" Apparatus
This desk-top, light weight apparatus produces controllable pressure to 8,700 psi (about 600 bar) at controllable temperature 200oC. User-select temperature corresponds to analogous pressure. The apparatus is used to induce any type of oil, resin and oleoresin into the surface-reaching cracks of emeralds and other beryls, rubies-sapphires and other gems. more...
PRODUCTION READY FOR DELIVERY AT END OF OCTOBER 2013

Comparison features between all Gemlab models, setting up heat-treatment facility and consumable required

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