Optical Properties of Bastnasite

Bastnasite

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1 Optical Properties

1.1 Luster

Vitreous, Greasy, Pearly

1.2 Pleochroism

Faint

1.3 Dispersion

Albite Optical ..

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Not Available

Rank: N/A (Overall)▶

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Fluorite Optical Properties

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0.044 (Anglesite Opt..)

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1.4 Transparency

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.717-1.722

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

1.8 Birefringence

0.100

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Bastnasite Luster

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

Bastnasite luster is the quantity of light the crystal reflects when light is incident on it. Bastnasite which is commonly found in Reddish, Brown color, is Gemmological Tables (2004) More from other references in nature. It possess Greasy, Pearly and Vitreous luster.

Red Gemstones

Beudantite

Bornite

Carnallite

Piemontite

Erythrite

Kainite

Bastnasite Refractive Index

Optical properties of a Bastnasite 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 Bastnasite.

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 Bastnasite refractive index is 1.717-1.722. Birefringence value for this gem is 0.100. So if you are searching for prominent Red Gemstones, Bastnasite gem is something not miss on, since it has been a favorite pick in the gem wearing community.