Assertion: garnet's index | /r/HasAspect | refractive index of 1.712
Facets:
value: to 1.762
type: OTHER
Source sentences:
text: Taaffeite has a specific gravity of 3.60 to 3.62, almost identical to that of spinel (3.54 to 3.63); and a refractive index of 1.719 to 1.730, also similar to spinel, which has a refractive index of 1.712 to 1.762.