Goethite Luster
Optical Properties of Goethite are its behavioral responses towards light. While few optical properties can be identified with naked eyes, other require special instruments by the gemologists to identify them. Goethite optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification and evaluation.
Goethite luster is the quantity of light the crystal reflects when light is incident on it. Goethite which is commonly found in Brown, Brown, Reddish, Brownish, Yellow, Brown, Reddish, Brownish, Yellow color, is Gemstones (2009) in nature. It possess Adamantine luster.