Heat treatment technology
Heat treating ruby-sapphire
Beryllium detection using LIBS
Lead-filled rubies
Cranking up the heat
Treatment disclosure

 

NEWS FROM MY RESEARCH LAB
Watch out the new treatment techniques on ruby & sapphire developed in our lab. Many rubies are sold in the open market with fancy certs without representing the true nature of these gems.



Established in 1975 by Ted Themelis and his family, Gemlab has remained committed in serving the gem trade industry representing a heritage of innovation, experience and trust for over 35 years. For more than 25 years Gemlab and Ted Themelis manufacture innovative gemstone treatment furnaces and equipment par excellence based on our in-depth, diversified knowledge on the subject. All furnaces and related gemstone treatment equipment are designed by Ted Themelis, an international renowned expert in gemstone treatment and they are available only from our laboratory in Bangkok, Thailand. We do not have agents or resellers of our products. You are dealing direct with the source assuring the best service and best price of our products.

For the first time now the serious gem dealer can start heating a handful of gems next to his desk using our our mini 1700oC furnace (Model M40-1700) occupying less than 2 square feet of desk space and plugged into any 220 Vac electric outlet. Other furnace models are available.

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 user-customer. We only sell our furnaces and related gem treatment equipoment 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 time, cooking temperature at a given time, water, ingredients, and other parameters 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 undestand 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 user, I suggest to take my course #510 offered periodically in Bangkok before buying any gem treatment equipment. - Ted Themelis

 

GemLab F-series Box Half-Muffle HIgh Temp. Furnace

Model MB-1700 is a "feather-weight", desk-top furnace for heat-treating rubies, pink, yellow sapphires in three different setup modes, with/without half-muffle, in air, or in oxidizing atmosphere, or in vacuum, with/without additives with loads up to 600 cc at 1700 íC or 1800 í C.... more...
GemLab F-series Mini Muffle High Temperature Furnace
Model M40-1700, known as "mini-muffle" furnace, is a "light-weight", desk-top muffle furnace designed for the smallest load possible. Up to 600 cc of rubies-sapphires can be heat-treated in four different setup configuration modes in oxidizing-reducing atmosphere, or in vacuum, slow or rapid cooling, with or without additives at 1700 í C. or 1800 í C. depending on the model... .more... 
Gemlab F-series Maxxi Muffle High Temperature Furnace
Model M76-1700, known as "maxxi-muffle" furnace, is a medium size lab furnace providing great flexibility and performance. Up to 330 cc of rubies-sapphires may be heat-treated in four different setup configuration modes in air, oxidizing-reducing or in vacuum, slow or rapid cooling, with or without additives at 1700 í C. or 1800 í C. depending on the model... more... 
High Pressure, Low-Temp "OILING" Apparatus
This desk-top, light weight apparatus produces controllable pressures to 10,000 psia at low temperature). It is used to induce any type of oil, resin and oleoresin into the surface-reaching cracks of emeralds, rubies, sapphires and other gemstones in order to improve their clarity... more..

TERMS OF USE
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