Optical Properties of Feldspar

Feldspar

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

None

1.3 Dispersion

Not Available

Rank: N/A (Overall) ▶

0.007 1

1.4 Transparency

Transparent, Translucent

1.5 Refractive Index

1.518-1.570

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic or monoclinic

1.8 Birefringence

0.008-0.010

0 0.296

1.9 Clarity

Transparent

Feldspar Luster

Optical Properties of Feldspar 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. Feldspar optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification and evaluation.

Feldspar luster is the quantity of light the crystal reflects when light is incident on it. Feldspar which is commonly found in Yellow, Green color, is Translucent and Transparent in nature. It possess Vitreous luster.

Green Gemstones

Feldspar Refractive Index

Optical properties of a Feldspar crystal are responsive to the small changes in composition and strain within its crystalline structure. Absolute diligence is therefore necessary during cutting and polishing of the gemstone. All such optical properties are majorly influenced by Physical Properties of Feldspar.

As we are well aware, refractive index is the phenomenon which is related to bending of light through a medium (crystal). It is used in qualitative analysis of gemstones by gemologists Besides, few gemstones exhibit property of dual refractive indices. This dual nature is known as Birefringence. The value of Feldspar refractive index is 1.518-1.570. Birefringence value for this gem is 0.008-0.010. So if you are searching for prominent Green Gemstones, Feldspar gem is something not miss on, since it has been a favorite pick in the gem wearing community.

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