Andalusite

Dumortierite

Andalusite Vs Dumortierite

Andalusite

Dumortierite

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Astrology

Origin

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

Southern and central Africa

Color

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

Blue, Violet, Brown, White, Greenish, pink

Streak

White

For which Rashi?

Leo, Sagittarius

Planet

Venus

Saturn

Element of Planets

Water

Energy

How to Wear?

Finger

Ring Metal

Deities

Isis

Not to wear with

Powers

Healing

Birthstone

Planetary

Talisman

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.05-3.213.26-3.41

1 7.18

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Fracture

Uneven, Subconchoidal, Splintery

Fibrous, ConchoidalWalter Schumann

Cleavage

Good on {110}, poor on {100}

Distinct on {100}, poor on {110}; parting on {001}

Mohs Hardness

7.57-8.5

2 10

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Chemical Composition

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

AlAl₆O₃BSi₃O₁₈

Optical Properties

Luster

Vitreous, Greasy

Vitreous

Pleochroism

strongly trichroic

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

Dispersion

0.020.01

0.005 1

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Transparency

Transparent, Translucent

Translucent, Translucent to opaque

Refractive Index

1.627-1.6501.669-1.723

1 3.25

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Optic Character

Crystal System

Orthorhombic

Birefringence

0.009-0.0100.011-0.037

0 0.296

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Clarity

Transparent

Translucent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Supports heart health

Respiratory

Excellent

Good

Reproductive

Digestive

Psychology

Perception

Patience

Healing

Physical healing

Emotional healing

Qualities Associated

Self-Realization

Patience

Andalusite Vs Dumortierite Fracture

Fracture is an important parameter when you compare Andalusite and Dumortierite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Dumortierite 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. Dumortierite fracture is Fibrous and ConchoidalWalter Schumann.

Compare Brown Gemstones

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Andalusite Vs Dumortierite Luster

A primary knowledge about Andalusite vs Dumortierite 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. Dumortierite, on other hand, exhibits Vitreous luster.