1. Lab Created Ruby and Sapphires are made of Lab Corundum (also called Flame fusion method).
2. Lab Created Spinels are made of Lab Spinel (also called Flame fusion method).
3. Lab Created Alexandrite is made by Czochralski pulling (very expensive method). Beware of sellers selling lab corundum as Czochralski.
4. Lab Created Amethyst, Citrine, Ametrine, Emerald, Aquamarine are made by Hydrothermal process.

Imitation Stone are made in the laboratory and looks like a natural stone but do not and have similar chemical composition and physical properties of their natural counterparts. For example: A imitation or CZ Ruby does look like a Natural Ruby but do not posses similar chemical composition and physical properties of a natural Ruby. They just imitate the color and look of a Natural Stone. They are the finest stones money can buy. They look better than natural and all stones are fine gem quality. Most of these stones are made of "Lab Spinel" or "Lab Corundum" or "Lab CZ" or “Glass”. Most dealers will sell these stones as "lab created". But actually they should be called as “Cubic Zirconia” or “CZ” or “Glass” or “Imitation Stones”  or  “Simulated Stones”. Some of the imitation stones are also of good quality and also widely accepted in the gem industry. Fr example:

1. Cubic Zirconia (CZ) has been a popular imitation gem that is used in the gem industry for several decades to simulate a natural diamond. This stones has similar look and sparkle to that of a natural diamond but just cost a fraction to that that of a natural diamond.
2. Lab Corundum Alexandrite (the technical name should be called as color change sapphire) does not posses the similar chemical composition and physical properties of natural Alexandrite. But it is widely used to imitate Alexandrite. This Lab corundum alexandrite is also of high quality.
3. Any Imitation stones that is made of Lab corundum, Lab Spinel, Hydrothermal and Cubic Zirconia are of fine quality.
4. Simulated Gemstones are another type of imitation Gemstones and are usually made of Glass.  Simulated Stones closely resembles genuine stones like Emerald, Peridot, Rubies, Sapphires, Aquamarine, Tourmaline, etc... Because it is singly refractive this stone boasts consistent color throughout. Simulated Stoned provides Jewelry Creators with affordable gem alternatives in many color shades. It is available in a wide variety of shapes and sizes. It does not have good sparkle and is not durable as cubic zirconia, but price wise it is a lot cheaper alternative.
   
   

   	Cubic Zirconia	Lab Corundum	Lab Spinel	Hydrothermal	Glass
   Chemical Composition	ZrO2	Al2O3	MgO.3.5 Al2O3	SiO2	Glass
   Hardness	Mohs 8.5	Mohs 9	Mohs 8	Mohs 7	Mohs 5.5
   Specific Gravity	5.65 - 5.95	3.99-3.98	3.61	2.65	2.30 - 4.50
   Refractive Index	2.088- 2.176	1.76 - 1.769	1.727	1.544 - 1.553	1.50 - 1.70

   
   Why buy a Man Made Gemstone?1. Lab Created stones are the perfect version of the natural stones. Lab created stones usually comes with the best colors and without any flaws or inclusions - that is very rare or highly expensive to be obtained with a natural stone.  2. The price of a Lab stone is just a fraction of the cost of a natural Stone. It is very easy for a gems collector to have various colors, various sizes and shapes for their collection at a low cost. They cost only a fraction of the natural stones. 3. Large size cubic zirconia stones are very ideal for display. They do have a very good sparkle and look very beautiful when kept in display.  They are ideal for display at home or office.4. Sine man made gemstones have very good sparkle and flawless, they can make a perfect gift for anyone. These are most beautiful, valuable and durable gifts that you can offer for your loved ones.  
   
   If you need any additional information about man Made Gemstones, please feel free to contact us. We do have several decades of experience in this industry and we can give you explanations both technically and practically.