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Siderite
Siderite

Andradite Garnet
Andradite Garnet



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Siderite
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Andradite Garnet

Siderite and Andradite Garnet Optical Properties

Optical Properties

Luster

Pearly
Adamantine

Pleochroism

-
-

Dispersion

0.040.03
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent, Opaque, Transparent to opaque

Refractive Index

1.633-1.8751.888-1.889
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
Isometric

Birefringence

0.242-9999
0 0.296
👆🏻

Clarity

Transparent
Transparent to opaque

Siderite and Andradite Garnet Optic Character

Siderite and Andradite Garnet optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Siderite and Andradite Garnet Physical Properties 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 Siderite and Andradite Garnet 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.

Siderite and Andradite Garnet Transparency

Similar to their colors, Siderite and Andradite Garnet transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Siderite is Transparent and Translucent while Siderite is Transparent and Translucent in appearance.