Blue John

Dumortierite

Blue John Vs Dumortierite

Blue John

Dumortierite

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1 Astrology

1.1 Origin

Not Available

Southern and central Africa, violet, blue, violet, blue

1.2 Color

White, Colorless, Blue, Red, Green, Yellow, Violet

Blue, Violet, Brown, White, Blue, Brown, Violet, Greenish, pink

1.3 Streak

Not Available

White

1.4 For which Rashi?

Not Available

Leo, Sagittarius, Leo, Sagittarius, Leo, Sagittarius

1.5 Planet

Not Available

Saturn

1.6 Element of Planets

Not Available

Water

1.7 How to Wear?

1.7.1 Finger

Not Available

1.7.2 Ring Metal

Not Available

1.8 Energy

Not Available

Receptive

1.9 Deities

Not Available

Isis

1.10 Not to wear with

Not Available

1.11 Powers

Not Available

Healing

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

3.00-3.253.26-3.41

1 7.18

2.5 Fracture

Not Available

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

2.6 Cleavage

Not Available

Distinct on {100}, poor on {110}; parting on {001}

2.7 Mohs Hardness

Not Available7-8.5

2 10

2.8 Chemical Composition

CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)

AlAl₆O₃BSi₃O₁₈

3 Optical Properties

3.1 Luster

Not Available

Vitreous

3.2 Pleochroism

Not Available

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

3.3 Dispersion

NANone

0.007 1

3.4 Transparency

Transparent

Translucent, Translucent to opaque

3.5 Refractive Index

1.432-1.4361.669-1.723

1 3.25

3.6 Optic Character

Not Available

3.7 Crystal System

Not Available

Orthorhombic

3.8 Birefringence

Not Available0.011-0.037

0 0.296

3.9 Clarity

Transparent

Translucent

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

Blue John Vs Dumortierite Fracture

Fracture is an important parameter when you compare Blue John and Dumortierite Physical Properties. It is necessary to understand the significance of these properties, before you compare Blue John Vs Dumortierite 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. Dumortierite fracture is ConchoidalWalter Schumann, Fibrous and Gemstones of the world (2001) More from other references.

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Blue John Vs Dumortierite Luster

A primary knowledge about Blue John vs Dumortierite 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. Dumortierite, on other hand, exhibits Vitreous luster.