Sillimanite

Alexandrite

Sillimanite Vs Alexandrite

Sillimanite

Alexandrite

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Astrology

Origin

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

Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma, India, Origins: Russia

Color

Blue, Green, Brownish, Greenish, Colorless, gray

Green

Streak

White

For which Rashi?

Scorpio

Planet

Venus

Element of Planets

Earth

Energy

How to Wear?

Finger

Ring Metal

Deities

Not to wear with

Powers

Love

Birthstone

Planetary

Talisman

Physical Properties

Tenacity

Tough

Solubility

Durability

Specific Gravity

3.20-3.263.69-3.81

1 7.18

👆🏻

Fracture

Splintery

Cleavage

{010} perfect

1,1 ; 3,2.

Mohs Hardness

6-7.58.5

2 10

👆🏻

Chemical Composition

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

BeAl ₂ O ₄

Optical Properties

Luster

Vitreous, Subadamantine, Silky

Vitreous

Pleochroism

Colourless to pale brown to yellow

Dispersion

0.020.02

0.005 1

👆🏻

Transparency

Transparent, Translucent

Transparent, Transparent to nearly opaque

Refractive Index

1.653-1.6851.739-1.770

1 3.25

👆🏻

Optic Character

Biaxial/+

Crystal System

Orthorhombic

Birefringence

0.020-0.0220.007-0.010

0 0.296

👆🏻

Clarity

Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Aids in grounding and protection

Respiratory

Good

Excellent

Reproductive

Supports reproductive health

Digestive

Psychology

Creativity

Transformation

Healing

Emotional healing

Qualities Associated

Creativity

Transformation

Sillimanite Vs Alexandrite Fracture

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

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Sillimanite Vs Alexandrite Luster

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