Andalusite

Bertrandite

Andalusite Vs Bertrandite

Andalusite

Bertrandite

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1 Astrology

1.1 Origin

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

Not Available, Southern and central Africa

1.2 Color

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

Colorless, Colorless, Yellow

1.3 Streak

White

1.4 For which Rashi?

All

Not Available

1.5 Planet

Venus

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

Projective, Receptive

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

Not Available

2.2 Solubility

Not Available

2.3 Durability

Not Available

2.4 Specific Gravity

3.05-3.212.59-2.60

1 7.18

2.5 Fracture

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

Brittle, Metallic, Brittle, Metallic

2.6 Cleavage

Good on {110}, poor on {100}

{001} Perfect, {110} Distinct, {101} Distinct

2.7 Mohs Hardness

7.56-7

2 10

2.8 Chemical Composition

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

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

3 Optical Properties

3.1 Luster

Vitreous, Greasy

Vitreous

3.2 Pleochroism

strongly trichroic

none.

3.3 Dispersion

0.02NA

0.007 1

3.4 Transparency

Transparent, Translucent

TransparentAnthony et al, Handbook of mineralogy (2001)

3.5 Refractive Index

1.627-1.6501.583-1.614

1 3.25

3.6 Optic Character

Not Available

3.7 Crystal System

Orthorhombic

Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21

3.8 Birefringence

0.009-0.010Not Available

0 0.296

3.9 Clarity

Transparent

TransparentAnthony et al

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

Andalusite Vs Bertrandite Fracture

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

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Andalusite Vs Bertrandite Luster

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