Sillimanite

Cobaltite

Sillimanite Vs Cobaltite

Sillimanite

Cobaltite

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1 Astrology

1.1 Origin

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

Canada

1.2 Color

Blue, Green, Brownish, Greenish, Colorless, gray

Reddish, White, Violet, gray, Black, Reddish, White, Violet, gray, Black

1.3 Streak

White

Black

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

3.20-3.266.3

1 7.18

2.5 Fracture

Splintery

UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic

2.6 Cleavage

{010} perfect

{100} Good, {010} Good, {001} Good

2.7 Mohs Hardness

6-7.55.5

2 10

2.8 Chemical Composition

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

CoAsSAnthony et al , Handbook of mineralogy (2001)

3 Optical Properties

3.1 Luster

Vitreous, Subadamantine, Silky

Not Available

3.2 Pleochroism

Colourless to pale brown to yellow

Very weak

3.3 Dispersion

NANA

0.007 1

3.4 Transparency

Transparent, Translucent

Gems

3.5 Refractive Index

1.653-1.685Not Available

1 3.25

3.6 Optic Character

Not Available

3.7 Crystal System

Orthorhombic

Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: P ca21

3.8 Birefringence

0.020-0.022Not Available

0 0.296

3.9 Clarity

Transparent

Gems

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 Cobaltite Fracture

Fracture is an important parameter when you compare Sillimanite and Cobaltite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Cobaltite 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. Cobaltite fracture is Brittle, Handbook of mineralogy (2001) More from other references, Handbook of mineralogy (2001) More from other references, Metallic, UnevenAnthony et al and UnevenAnthony et al.

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Sillimanite Vs Cobaltite Luster

A primary knowledge about Sillimanite vs Cobaltite 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.