Blue sapphires are evaluated based upon the purity of their primary hue. The deeper the pink color, the higher their monetary value.
Sapphire is one of the two gem-varieties of corundumthe other being ruby defined as corundum in a shade of red. An A-Z Guide to the Elements. They also may be created synthetically in laboratories for industrial or decorative purposes in large crystal boules. Retrieved 21 March Corundum that contains ~0. If the dome is oriented in between these two directions, an 'off-center' star will be visible, offset away from the high point of the dome. Aluminium oxideAl 2 O 3.
However, despite what the terms "heating only" and "diffusion" might suggest, both of these categories of treatment actually involve diffusion processes. The first laser was made with a rod of synthetic ruby. Treated padparadschas may be very difficult to detect, and many stones are certified by gemological labs e. Thin sapphire wafers were the first successful use of an insulating substrate upon which to deposit silicon to make the integrated circuits known as silicon on sapphire or "SOS"; now other substrates can also be used for the class of circuits known more generally as silicon on insulator.
Retrieved 18 June Every sapphire mine produces a wide range of quality — and origin is not a guarantee of quality. Typically beryllium is diffused into a sapphire under very high heat, just below the melting point of the sapphire. However, despite what the terms "heating only" and "diffusion" might suggest, both of these categories of treatment actually involve diffusion processes.
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