The visual property of something shining with reflective light; shine(noun)
The coefficient of specular reflectivity associated with the surface of an object being displayed(noun)
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Use "shininess" in a sentence
"The dual purpose also exists in the equation of shininess with impenetrability and completeness: this shininess is available to paintings through varnishing, and to textiles through the oiling or calendaring of cloths, or the use of glossy fibers."
"Whereas, the Assembly building has been created by people of such narrow and blinkered view that they seem to be mesmerised by the 'shininess' of their building."
"Ummm ... its pretty cool, as far as the 'shininess' factor goes."