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Dumortierite
Dumortierite

Andalusite
Andalusite



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X
Dumortierite
X
Andalusite

Dumortierite Vs Andalusite

Astrology

Origin

Southern and central Africa
Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)

Color

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

Streak

White
White

For which Rashi?

Leo, Sagittarius
-

Planet

Saturn
Venus

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

3.26-3.413.05-3.21
1 7.18
👆🏻

Fracture

Fibrous, ConchoidalWalter Schumann
Uneven, Subconchoidal, Splintery

Cleavage

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

Mohs Hardness

7-8.57.5
2 10
👆🏻

Chemical Composition

AlAl6O3BSi3O18
Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Optical Properties

Luster

Vitreous
Vitreous, Greasy

Pleochroism

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

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Translucent, Translucent to opaque
Transparent, Translucent

Refractive Index

1.669-1.7231.627-1.650
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.011-0.0370.009-0.010
0 0.296
👆🏻

Clarity

Translucent
Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus
Enhances mental clarity and focus

Cardiovascular

-
Supports heart health

Respiratory

Good
Excellent

Reproductive

-
-

Digestive

-
-

Psychology

Patience
Perception

Healing

Emotional healing
Physical healing

Qualities Associated

Patience
Self-Realization

Dumortierite Vs Andalusite Fracture

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

Dumortierite Vs Andalusite Luster

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