Vivianite

Sillimanite

Vivianite Vs Sillimanite

Vivianite

Sillimanite

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Astrology

Origin

Southern and central Africa

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

Color

Blue, Green, Colorless

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

2.64-2.703.20-3.26

1 7.18

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Fracture

Splintery

Cleavage

{010} Perfect

{010} perfect

Mohs Hardness

-99996-7.5

2 10

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Chemical Composition

Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

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

Optical Properties

Luster

Vitreous, Pearly

Vitreous, Subadamantine, Silky

Pleochroism

Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael OâDonoghue

Colourless to pale brown to yellow

Dispersion

0.030.02

0.005 1

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Transparency

Transparent

Transparent, Translucent

Refractive Index

1.560-1.6401.653-1.685

1 3.25

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Optic Character

Crystal System

Orthorhombic

Birefringence

0.054-0.0750.020-0.022

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Respiratory

Good

Reproductive

Digestive

Psychology

Hope

Creativity

Healing

Emotional healing

Qualities Associated

Transformation

Creativity

Vivianite Vs Sillimanite Fracture

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

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Vivianite Vs Sillimanite Luster

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