1 Colorles Sapphire – Gems stone
Pink Color Tourmaline Specimen

Pink Color Tourmaline Specimen

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Blue sapphire gemstone Specimen

Blue sapphire gemstone Specimen

Blue sapphire gemstone Specimen,sapphire crystal Specimen,Tourmaline Specimen,Crystal Tourmaline, More »

Tourmaline Cuts Shapes

Tourmaline Cuts Shapes

Tourmaline Cuts Shapes,Blue sapphire gemstone Specimen,sapphire crystal Specimen,Tourmaline Specimen, More »

watermelon Tourmaline

watermelon Tourmaline

watermelon Tourmaline,Blue sapphire gemstone Specimen,sapphire crystal Specimen,Tourmaline Specimen, More »

Blue sapphire gemstone Specimen

Blue sapphire gemstone Specimen

watermelon Tourmaline,Blue sapphire gemstone Specimen,sapphire crystal Specimen,Tourmaline Specimen, More »

 

Category Archives: Colorles Sapphire

COLOURLESS SAPPHIRE

COLOURLESS SAPPHIRE

The different colours found within members of the corundum group are due to small amounts of metal oxide impurities .Corundum without impurities  is rare,but found is classified as colourless sapphire .Stones made up of different colours,  including colourless areas ,are more common .Stones like these are generally orientated by the cutter so that the colour is at the base. Then ,when viewed from above ,colour fills the stone.

OCCURENCDE : Truly colourless sapphire is found in Srilanka  .Cloudy or milky coloured  sapphire is also found in Srilanka ,and referred to locally as geuda .Heat treatment of geuda produces blue sapphire ,much of which is faceted and used in jewellery .Some Srilankan  corundum  shows red, blue, and colourless areas,which may be faceted or polished to give an interesting stone.

REMARK:  Synthetic colourless corundum has been produced by the Verneuil method since about the 1920s, and has been called diamondite .

 

GREEN SAPPHIRE

From medieval  times until the end of the 19th  century green sapphire was reffered to as “oriental peridot “ .Many sapphires that appear green actually consist of very fine alternating bands of blue and yellow sapphire,which may be visible under a microscope .

OCCURRENCE: Green sapphires are found in Thailand ,Srilanka ,and Australia .

PINK SAPPHIRE

Pure pink sapphire is coloured by very small quantities of chromium ,and with increasing amount of chromium .Tiny amount of iron may produce pink-orange stones called padparadscha ,or iron and titanium impurities togather make a purplish stone. Pink sapphires are often cut with a deep profile .

OCCURRENCE : Pink sapphires ,from a very pale and delicate pink to a near –red ,occur in Srilanka ,Burma,and East Africa .

REMARK: Like rubuies pink sapphires are believed to ward  off ill –health and misfortune .For the wearer to gain benefit of the stone ,however ,it is thought necessary for it to be worn directly on the skin. Therefore stones are cut so that ,when set in a piece of jewellery ,the back makes contact with the skin .

 

YELLOW SAPPHIRE

Up until the end of the 19th century yellow sapphire was known as “oriental topaz” (only blue corundum was called sapphire ). Nevertheless yellow and greenish yellow sapphires make unusual and attractive gemstones in their own right .

OCCURRENCE: In Queensland and New south wales (Australia) ,a greenish  yellow purely yellow stones in Srilanka ,Montana (USA),and East Africa.