Obsidian

Andalusite

Obsidian Vs Andalusite

Obsidian

Andalusite

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1 Astrology

1.1 Origin

Australia, Canada, Guatemala, Italy, Kenya, Mexico, Turkey

Spain, Brazil, USA, Sri Lanka, Burma, Color: strongly pleochroic, reddish brown, pink / yellowish green, Hardness: 7 7.5, Refractive index: 1.63 1.65, Density: 3.13 3.21, Chemical composition: Al2SiO5, Crystal structure: orthorhombic, Lustre: vitreous, greasy, Origins: Spain, Burma. Discovered in Andalusia (Spain), the andalusite stone is relatively rare, with big crystals over 10 ct. especially rare. Due to its remarkable pleochroism effect, the stone is highly valued by collectors., brown

1.2 Color

Brown, Green

Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red

1.3 Streak

Not Available

White

1.4 For which Rashi?

Sagittarius

All

1.5 Planet

Not Available

Venus

1.6 Element of Planets

Not Available

1.7 Energy

Projective

Projective, Receptive

1.8 How to Wear?

1.8.1 Finger

Not Available

1.8.2 Ring Metal

Not Available

1.9 Deities

Itzpapalotl

Not Available

1.10 Not to wear with

Not Available

1.11 Powers

Protection

Not Available

1.12 Birthstone

1.12.1 Planetary

Not Available

1.12.2 Talisman

Not Available

2 Physical Properties

2.1 Tenacity

Not Available

2.2 Solubility

Not Available

2.3 Durability

Not Available

2.4 Specific Gravity

2.35-2.603.05-3.21

1 7.18

2.5 Fracture

Conchoidal, ConchoidalWalter Schumann

Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)

2.6 Cleavage

Not Available

Good on {110}, poor on {100}

2.7 Mohs Hardness

5-5.57.5

2 10

2.8 Chemical Composition

Not Available

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

3 Optical Properties

3.1 Luster

Vitreous

Vitreous, Greasy

3.2 Pleochroism

AbsentWalter Schumann

strongly trichroic

3.3 Dispersion

0.010.02

0.007 1

3.4 Transparency

Transparent, Translucent

3.5 Refractive Index

1.450-1.5501.627-1.650

1 3.25

3.6 Optic Character

Not Available

3.7 Crystal System

Amorphous

Orthorhombic

3.8 Birefringence

Not Available0.009-0.010

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

Obsidian Vs Andalusite Fracture

Fracture is an important parameter when you compare Obsidian and Andalusite Physical Properties. It is necessary to understand the significance of these properties, before you compare Obsidian Vs Andalusite 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 Obsidian is Conchoidal and ConchoidalWalter Schumann. Andalusite fracture is Uneven, Subconchoidal, Splintery, UnevenArthur Thomas and Gemstones (2009).

Compare Gems for Sagittarius

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Obsidian Vs Topaz

Obsidian Vs Andalusite Luster

A primary knowledge about Obsidian vs Andalusite 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. Obsidian exhibits Vitreous luster. Andalusite, on other hand, exhibits Vitreous and Greasy luster.