Andalusite

Biotite

Andalusite Vs Biotite

Andalusite

Biotite

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Astrology

Origin

Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)

Color

Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red

Brown, Yellow, White, Greenish

Streak

White

White, gray

For which Rashi?

Planet

Venus

Element of Planets

Energy

How to Wear?

Finger

Ring Metal

Deities

Not to wear with

Powers

Birthstone

Planetary

Talisman

Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.05-3.212.7-3.3

1 7.18

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Fracture

Uneven, Subconchoidal, Splintery

Uneven, Even

Cleavage

Good on {110}, poor on {100}

Perfect on the {001}

Mohs Hardness

7.52.5-3.0

2 10

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Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

K(Mg,Fe++)3[AlSi3O10(OH,F)2

Optical Properties

Luster

Vitreous, Greasy

Vitreous, Pearly

Pleochroism

strongly trichroic

Strong

Dispersion

0.02-

0.005 1

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Transparency

Transparent, Translucent

Refractive Index

1.627-1.6501.565-1.625

1 3.25

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Optic Character

Crystal System

Orthorhombic

monoclinic

Birefringence

0.009-0.0100.03-0.07

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Supports heart health

Respiratory

Excellent

Good

Reproductive

Digestive

Psychology

Perception

Grounding

Healing

Physical healing

Emotional healing

Qualities Associated

Self-Realization

Grounding

Andalusite Vs Biotite Fracture

Fracture is an important parameter when you compare Andalusite and Biotite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Biotite fracture. Whenever a gemstone chip breaks, it leaves a characteristic line along its breakage. Such lines are known as fracture and are used to identify the gemstones in their initial stages of production when they are in the form of rough minerals. Fracture is usually described with the terms “fibrous” and “splintery” to denote a fracture that usually leaves elongated and sharp edges. Fracture observed in Andalusite is Uneven, Subconchoidal and Splintery. Biotite fracture is Uneven and Even.

Compare Brown Gemstones

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Andalusite Vs Biotite Luster

A primary knowledge about Andalusite vs Biotite luster is useful in apparent identifications of these gemstones. Luster is the measure of light that gets reflected when incident on a finished cut gemstone. There are two major types of lusters: Silky and Adamantine. Since luster varies between two crystals of even the same gemstone, luster is limited to basic identification criteria. Andalusite exhibits Vitreous and Greasy luster. Biotite, on other hand, exhibits Vitreous and Pearly luster.