Sillimanite

Prehnite

Sillimanite Vs Prehnite

Sillimanite

Prehnite

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1 Astrology

1.1 Origin

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

Australia, Southern and central Africa, green, brown, Australia, France, green, brown, Australia, France

1.2 Color

Blue, Green, Brownish, Greenish, Colorless, gray

Green, Colorless, gray, Yellow, White

1.3 Streak

White

Colorless

1.4 For which Rashi?

Not Available

Libra

1.5 Planet

Not Available

Venus

1.6 Element of Planets

Not Available

Earth

1.7 How to Wear?

1.7.1 Finger

Not Available

1.7.2 Ring Metal

Not Available

1.8 Energy

Not Available

Receptive

1.9 Deities

Not Available

Freya

1.10 Not to wear with

Not Available

1.11 Powers

Not Available

1.12 Birthstone

1.12.1 Planetary

Not Available

1.12.2 Talisman

Not Available

2 Physical Properties

2.1 Tenacity

Tough

Brittle

2.2 Solubility

Not Available

2.3 Durability

Not Available

2.4 Specific Gravity

3.20-3.262.80-2.95

1 7.18

2.5 Fracture

Splintery

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

2.6 Cleavage

{010} perfect

Distinct on [001]

2.7 Mohs Hardness

6-7.56-6.5

2 10

2.8 Chemical Composition

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

Ca₂Al₂Si₃O₁₂(OH)

3 Optical Properties

3.1 Luster

Vitreous, Subadamantine, Silky

Vitreous

3.2 Pleochroism

Colourless to pale brown to yellow

AbsentWalter Schumann

3.3 Dispersion

NANone

0.007 1

3.4 Transparency

Transparent, Translucent

Translucent

3.5 Refractive Index

1.653-1.6851.611-1.673

1 3.25

3.6 Optic Character

Not Available

3.7 Crystal System

Orthorhombic

3.8 Birefringence

0.020-0.0220.021-0.033

0 0.296

3.9 Clarity

Transparent

TranslucentHerve Nicolas Lazzarelli

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

Sillimanite Vs Prehnite Fracture

Fracture is an important parameter when you compare Sillimanite and Prehnite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Prehnite 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. Prehnite fracture is Brittle, Gemstones of the world (2001) More from other references, Metallic, Uneven, UnevenWalter Schumann, White and Yellow.

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Sillimanite Vs Prehnite Luster

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