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Classic Kashmir Diagnostic Inclusions

One of the major characteristics in Kashmir is its long distinct hexagonal zones often filled with the flour inclusions that give the stone its glow. This "flour" is not resolvable under 160x. Ceylons sometimes have a flour-like inclusion (and the glow) but its not as fine and usually resolvable under 60x.

This "flour" or silk or however described has been thought to be very fine rutile needles.


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Treatments in Rubies


Treatment Purpose Stability Prevalence Detection
Heat Improves colour and/or clarity appearance Stable unless the stone is heated to very high temperatures Very Common; experts estimate that up to 95% of stones undergo some sort of heat treatment May be detectable by a trained gemologist of gemmological laboratory.* Can be undetectable, but assumed because of prevalence
Surface diffusion (heating to very high temperature in the presence of a colouring agent) Creates a very shallow layer of red colour in colourless or light coloured sapphire Stable under normal conditions, but the colour layer can be damaged or destroyed if the stone is repolished or recut Occasional
Diffusion-treated red corundum should not be called ruby
Detectable by a trained gemologist or gemmological laboratory*
Fracture-filling with oil or epoxy resin Improves clarity appearance by hiding fractures. Coloured oil or resin also improves colour appearance Fair. Heat and chemicals can damage or destroy the filling. Oil will probably dry out or discolour in time Occasional Detectable by a trained gemmologist or gemmological laboratory*
Cavity-filling with epoxy resin or glass Improves clarity appearance by hiding cavities; adds weight if the cavities are large Fair. Heat and chemicals can damage or destroy the filling Common Detectable by a trained gemmologist or gemmological laboratory*


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Synthetic Rubies


Ruby 'the Lord of the Gems' is desired for its rarity and beauty. Acquiring its name from Latin word 'Rubeus' it symbolize love and passion. It is the red variety of mineral corundum with colors ranging from purplish to bluish red to a yellowish red. However the finest variety of ruby has vivid red color with the faint undertone of blue as found generally in Burmese rubies. Ruby due to their sturdiness and beauty makes a fine choice for any piece of jewelry. It is an accepted birthstone for the July -born individuals.

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Ruby Care, Separation and Further Reading


Cleaning Methods ultrasonic: usually safe, but never for fracture- or cavity-filled stones
steamer: usually safe, but never for fracture- or cavity-filled stones
warm soapy water: Rubies can be cleaned in warm, soapy water, but avoid strong detergents and vigorous scrubbing on oiled stones.
Stability reaction to heat: Heat can cause a change in colour or clarity, it can also damage or destroy fracture- and cavity-fillings. 
stability to light: Rubies are generally stable to light, but bright lights can cause oil to leak or dry out.
reaction to chemicals: Chemicals can harm fillings and remove oil; soldering flux containing boron and firecoat made with boric acid powder, will etch the surface of even untreated stones.

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Rubies from Winza, Tanzania

In early 2008, a number of unique rubies has been discovered near Winza, a remote village in the southeastern Dodoma, Tanzania. Those Winza Rubies are of excellent colours, excellent brilliancy and excellent clarity that in some cases do not need enhancement. They display a very beautiful, vibrant colours of pure red, slightly orangy-red or orange-red colors.

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Who are we?

The Geohavens name is an assurance of timeless beauty, distinct quality and uncompromising value. The Company spares no effort in sourcing from the farthest markets and the deepest mines in order to unearth the most attractive gems.

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