Alexandrite

Sillimanite

Alexandrite Vs Sillimanite

Alexandrite

Sillimanite

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1 Astrology

1.1 Origin

Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma, India, Color: color change, from bluish green (daylight) to purple, red or brown (incandescent light), Hardness: 8, Refractive index: 1.74 1.77, Density: 3.68 3.80, Chemical composition: BeAl2O4, Crystal structure: orthorhombic, Origins: Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma

USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil

1.2 Color

Green

Blue, Green, Brownish, Greenish, Colorless, gray

1.3 Streak

Not Available

White

1.4 For which Rashi?

Scorpio

Not Available

1.5 Planet

Venus

Not Available

1.6 Element of Planets

Earth

Not Available

1.7 How to Wear?

1.7.1 Finger

Not Available

1.7.2 Ring Metal

Not Available

1.8 Energy

Projective, Receptive

Not Available

1.9 Deities

Not Available

1.10 Not to wear with

Not Available

1.11 Powers

Love

Not Available

1.12 Birthstone

1.12.1 Planetary

Not Available

1.12.2 Talisman

Not Available

2 Physical Properties

2.1 Tenacity

Not Available

Tough

2.2 Solubility

Not Available

2.3 Durability

Not Available

2.4 Specific Gravity

3.69-3.813.20-3.26

1 7.18

2.5 Fracture

Not Available

Splintery

2.6 Cleavage

1,1 ; 3,2.

{010} perfect

2.7 Mohs Hardness

8.56-7.5

2 10

2.8 Chemical Composition

BeAl ₂ O ₄

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

3 Optical Properties

3.1 Luster

Vitreous

Vitreous, Subadamantine, Silky

3.2 Pleochroism

Not Available

Colourless to pale brown to yellow

3.3 Dispersion

NANA

0.007 1

3.4 Transparency

Transparent, Transparent to nearly opaque

Transparent, Translucent

3.5 Refractive Index

1.739-1.7701.653-1.685

1 3.25

3.6 Optic Character

Biaxial/+

Not Available

3.7 Crystal System

Orthorhombic

3.8 Birefringence

0.007-0.0100.020-0.022

0 0.296

3.9 Clarity

Transparent

4 Benefits

4.1 Physical

4.1.1 Neurological

Not Available

4.1.2 Cardiovascular

Not Available

4.1.3 Respiratory

Not Available

4.1.4 Reproductive

Not Available

4.1.5 Digestive

Not Available

4.2 Psychology

Not Available

4.3 Healing

Not Available

4.4 Qualities Associated

Not Available

Alexandrite Vs Sillimanite Fracture

Fracture is an important parameter when you compare Alexandrite and Sillimanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Alexandrite Vs Sillimanite 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. Sillimanite fracture is Splintery.

Compare Gems for Scorpio

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Alexandrite Vs Sillimanite Luster

A primary knowledge about Alexandrite vs Sillimanite 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. Alexandrite exhibits Vitreous luster. Sillimanite, on other hand, exhibits Silky, Subadamantine and Vitreous luster.