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Rubellite
Rubellite

Sillimanite
Sillimanite



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Rubellite
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Sillimanite

Rubellite Vs Sillimanite

Astrology

Origin

Afghanistan, Brazil, Madagascar, Mozambique, Southern and central Africa, Russia, Sri Lanka
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil

Color

White, Colorless, Blue, Red, Green, Yellow, Violet
Blue, Green, Brownish, Greenish, Colorless, gray

Streak

-
White

For which Rashi?

-
-

Planet

-
-

Element of Planets

-
-

Energy

-
-

How to Wear?

Finger

-
-

Ring Metal

-
-

Deities

-
-

Not to wear with

-
-

Powers

-
-

Birthstone

Planetary

-
-

Talisman

-
-

Physical Properties

Tenacity

-
Tough

Solubility

-
-

Durability

-
-

Specific Gravity

3.01-3.063.20-3.26
1 7.18
👆🏻

Fracture

Conchoidal
Splintery

Cleavage

Indiscernible
{010} perfect

Mohs Hardness

7-7.56-7.5
2 10
👆🏻

Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Optical Properties

Luster

-
Vitreous, Subadamantine, Silky

Pleochroism

Strong: dark red pinkish-redHerve Nicolas Lazzarelli
Colourless to pale brown to yellow

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent, Translucent

Refractive Index

1.614-1.6661.653-1.685
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

0.014-0.0400.020-0.022
0 0.296
👆🏻

Clarity

Transparent
Transparent

Benefits

Physical

Neurological

-
-

Cardiovascular

-
-

Respiratory

Excellent
Good

Reproductive

-
-

Digestive

-
-

Psychology

Passion
Creativity

Healing

Emotional healing
Emotional healing

Qualities Associated

Passion
Creativity

Rubellite Vs Sillimanite Fracture

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

Rubellite Vs Sillimanite Luster

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