Sillimanite

Vivianite

Sillimanite Vs Vivianite

Sillimanite

Vivianite

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1 Astrology

1.1 Origin

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

Southern and central Africa

1.2 Color

Blue, Green, Brownish, Greenish, Colorless, gray

Blue, Green, Colorless

1.3 Streak

White

1.4 For which Rashi?

Not Available

1.5 Planet

Not Available

1.6 Element of Planets

Not Available

1.7 How to Wear?

1.7.1 Finger

Not Available

1.7.2 Ring Metal

Not Available

1.8 Energy

Not Available

1.9 Deities

Not Available

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

Not Available

2.2 Solubility

Not Available

2.3 Durability

Not Available

2.4 Specific Gravity

3.20-3.262.64-2.70

1 7.18

2.5 Fracture

Splintery

(e.g. graphite).

2.6 Cleavage

{010} perfect

{010} Perfect

2.7 Mohs Hardness

6-7.5Not Available

2 10

2.8 Chemical Composition

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

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

3 Optical Properties

3.1 Luster

Vitreous, Subadamantine, Silky

Vitreous, Pearly

3.2 Pleochroism

Colourless to pale brown to yellow

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

3.3 Dispersion

NANA

0.007 1

3.4 Transparency

Transparent, Translucent

Transparent

3.5 Refractive Index

1.653-1.6851.560-1.640

1 3.25

3.6 Optic Character

Not Available

3.7 Crystal System

Orthorhombic

Not Available

3.8 Birefringence

0.020-0.0220.054-0.075

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

Sillimanite Vs Vivianite Fracture

Fracture is an important parameter when you compare Sillimanite and Vivianite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Vivianite 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. Vivianite fracture is (e.g. graphite)..

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Sillimanite Vs Vivianite Luster

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