Prehnite

Andalusite

Prehnite Vs Andalusite

Prehnite

Andalusite

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1 Astrology

1.1 Origin

Australia, Southern and central Africa, green, brown, Australia, France, green, brown, Australia, France

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, Brazil, USA, Sri Lanka, 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

Green, Colorless, gray, Yellow, White

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

1.3 Streak

Colorless

White

1.4 For which Rashi?

Libra

All

1.5 Planet

Venus

1.6 Element of Planets

Earth

Not Available

1.7 How to Wear?

1.7.1 Finger

Not Available

1.7.2 Ring Metal

Not Available

1.8 Energy

Receptive

Projective, Receptive

1.9 Deities

Freya

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

Brittle

Not Available

2.2 Solubility

Not Available

2.3 Durability

Not Available

2.4 Specific Gravity

2.80-2.953.05-3.21

1 7.18

2.5 Fracture

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

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

2.6 Cleavage

Distinct on [001]

Good on {110}, poor on {100}

2.7 Mohs Hardness

6-6.57.5

2 10

2.8 Chemical Composition

Ca₂Al₂Si₃O₁₂(OH)

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

None0.02

0.007 1

3.4 Transparency

Translucent

Transparent, Translucent

3.5 Refractive Index

1.611-1.6731.627-1.650

1 3.25

3.6 Optic Character

Not Available

3.7 Crystal System

Orthorhombic

3.8 Birefringence

0.021-0.0330.009-0.010

0 0.296

3.9 Clarity

TranslucentHerve Nicolas Lazzarelli

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

Prehnite Vs Andalusite Fracture

Fracture is an important parameter when you compare Prehnite and Andalusite Physical Properties. It is necessary to understand the significance of these properties, before you compare Prehnite 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 Prehnite is Brittle, Gemstones of the world (2001) More from other references, Metallic, Uneven, UnevenWalter Schumann, White and Yellow. Andalusite fracture is Gemstones (2009), Splintery, Subconchoidal, Subconchoidal, Uneven, Uneven and UnevenArthur Thomas.

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Prehnite Vs Andalusite Luster

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