Allanite and Fancy Diamond Optic Character
Allanite and Fancy Diamond optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Allanite Vs Fancy Diamond like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Allanite and Fancy Diamond optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.