Sillimanite

Corundum

Sillimanite Vs Corundum

Sillimanite

Corundum

Add ⊕

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

Violet, Blue, Red, Yellow, Brown, gray

1.3 Streak

White

White, None

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

Brittle

2.2 Solubility

Not Available

insoluble

2.3 Durability

Not Available

2.4 Specific Gravity

3.20-3.263.90-4.05

1 7.18

2.5 Fracture

Splintery

Uneven, Uneven, Gems, Difficult, Fibrous

2.6 Cleavage

{010} perfect

None – parting in 3 directions

2.7 Mohs Hardness

6-7.59

2 10

2.8 Chemical Composition

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

Al 2O 3Arthur Thomas , Gemstones (2009)

3 Optical Properties

3.1 Luster

Vitreous, Subadamantine, Silky

Adamantine, Vitreous

3.2 Pleochroism

Colourless to pale brown to yellow

None

3.3 Dispersion

NA0.02

0.007 1

3.4 Transparency

Transparent, Translucent

3.5 Refractive Index

1.653-1.6851.758-1.780

1 3.25

3.6 Optic Character

Not Available

3.7 Crystal System

Orthorhombic

Trigonal

3.8 Birefringence

0.020-0.0220.007-0.010

0 0.296

3.9 Clarity

Transparent

Gemmological Tables (2004) More from other references

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 Corundum Fracture

Fracture is an important parameter when you compare Sillimanite and Corundum Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Corundum 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. Corundum fracture is Difficult, Fibrous, Gems, Uneven and Uneven.

Compare Blue Gemstones

Sillimanite Vs Tanzanite

Sillimanite Vs Strontium Titanate

Sillimanite Vs Starlite

Sillimanite Vs Corundum Luster

A primary knowledge about Sillimanite vs Corundum 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. Corundum, on other hand, exhibits Adamantine and Vitreous luster.