Figure 1. Natural sapphires,
such as these 45
princess cuts from
Madagascar, come in a
broad range of colors.
Nevertheless, the high
demand for fine ruby
and sapphire has led to
a wide variety of treatments,
of which heating
to improve color
and/or clarity is perhaps
the most common.
These sapphires
have a total weight of
23.08 ct. Courtesy of
Pala International,
Fallbrook, California;
photo © Jeff Scovil
Figure 1. Natural sapphires,such as these 45princess cuts fromMadagascar, come in abroad range of colors.Nevertheless, the highdemand for fine rubyand sapphire has led toa wide variety of treatments,of which heatingto improve colorand/or clarity is perhapsthe most common.These sapphireshave a total weight of23.08 ct. Courtesy ofPala International,Fallbrook, California;photo © Jeff Scovil
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