A gemstone or gem is a piece of mineral crystal which, in cut and polished form,
is used to .... Each laboratory has its own methodology to evaluate gemstones. ...
Even the same gemstone can occur i...
When buying sapphire, you should know how to evaluate the quality of the stone
to ... While blue is the most common color for a sapphire, these gemstones also ...
The dispersion of corundum is so low (0.028) and the masking effect of the rich
body color so high, that it is generally not a factor in ruby and sapphire evaluation
Reports and Services available for colored stones. ... For polished, rough, loose
or mounted natural ruby, sapphire, emerald, Paraíba tourmaline, and red spinel ...
How to Evaluate Sapphires. Sapphires come in a wide range of beautiful colors.
Most people think of this lovely gemstone as being a deep blue color, but ...
This is the color – an intense azure hue matched in the world of gems only by the
finest ... This is, of course, apropos in the evaluation of any gem, but of utmost ...
The most important thing when selecting a colored gemstones is to choose a ....
Our guides shows you step-by-step how to evaluate sapphire and settings in ...
How to evaluate colored gemstones: ... the padparadscha, the rhodolite or
cornflower blue sapphire which are characterized by the combination of hue and
Colors. Sapphires come in all ranges of colors from blue to black to colorless and
all .... The second consideration in evaluating a blue sapphire is sheer beauty.
The Darling Red Ruby With renewed interest in colored gemstones taking center
stage ... Said to be one of the rarest of the big three — rubies, sapphires, and ...
As with emeralds, the most important factor when evaluating a ruby is its color.