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Cordierite
Cordierite

Howlite
Howlite



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Cordierite
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Howlite

Cordierite and Howlite Optical Properties

1 Optical Properties
1.1 Luster
Greasy, Vitreous
Vitreous
1.2 Pleochroism
X = pale yellow
NilArthur Thomas
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Gemmological Tables (2004) More from other references
1.5 Refractive Index
Not Available1.583-1.608
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
monoclinic
1.8 Birefringence
Not Available0.019
Achroite
0 0.296
1.9 Clarity
Not Available
Gemmological Tables (2004) More from other references

Cordierite and Howlite Optic Character

Cordierite and Howlite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Cordierite and Howlite 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 Cordierite and Howlite 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.

Cordierite and Howlite Transparency

Similar to their colors, Cordierite and Howlite 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, Cordierite is Not Available while Cordierite is Not Available in appearance.