What can inclusions reveal about ruby and sapphire origins.
Burmese blue sapphire inclusions.
The burma sapphires are formed in the igneous rocks that undergo contact and regional metamorphosis.
A magnified image showing a cluster of rutile silk in an untreated burmese blue sapphire.
The top spectrum o ray is offset of 0 1 absorbance unit for clarity.
Surface diffusion treated blue sapphire.
A mong the highlights in the upcoming magnificent jewels and noble jewels sale in geneva on 15 november are several exquisite kashmir burmese and ceylon sapphires.
In general burmese thai and australian blue sapphires contain crystals of plagioclase feldspars orthoclase niobite columbite calcite monazite zircon apatite fergusonite and thorite.
Completely untreated it displays a vivid royal blue with remarkable saturation.
Rounded guest crystals possibly calcite in an un treated burmese blue sapphire.
Limited supply and strong demand also fluctuate burma neelam stone price upto a certain extent.
The spectra are normalized to a millimeter thickness.
The color is truly exceptional with a saturation rarely.
Liquid fingerprints guest crystals and two phase inclusions in an un treated burmese blue sapphire.
Blue zones enriched along facet joints and girdle.
Color clarity cut and carat weight are the major factors influencing burmese sapphire value.
In india faceted burmese blue sapphire price per carat starts from 25 000 per carat 390 approx and goes up to 5 lakh per carat 7795 approx and even above.
As a genuine gem some inclusions are expected to be found in burmese sapphire.
Folded fluid feathers and fingerprints are the most common inclusions in unheated burma sapphires.
The richness and consistency of the color and the velvety texture is due in part to fine rutile silk inclusions that disperse light.
These exquisite gems originate from areas known to produce some of the finest sapphires in the world kashmir in northern india across its eastern border to myanmar previously burma and their island neighbour sri lanka.
Mining of burma sapphire gemstone.
Liquid fingerprint inclusion in an un treated burmese blue sapphire.
Cascades of swirled clouds included in a beryllium treated blue sapphire.
Photo courtesy of apsara co uk.
Expect high saturation of color in burmese sapphire.
This feature is found in a beryllium treated blue sapphire due to high temperatures applied in this process.
Colored stones are generally far more saturated with inclusions at a level of 10x magnification than diamonds.
Inclusions in unheated sapphire from burma myanmar.
Photo courtesy of apsara co uk.
The polarized uv vis nir spectra from 250 to 1000 nm of a classic burmese blue sapphire are different from those of baw mar blue sapphire.
Short rutile also sometimes referred to as the burmese silk is the most common inclusion.
The 5 09 ct blue sapphire from mogok burma shown above is such a gem.
