Alexandrite

Lapis lazuli

Alexandrite Vs Lapis lazuli

Alexandrite

Lapis lazuli

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1 Astrology

1.1 Origin

Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma, India, Color: color change, from bluish green (daylight) to purple, red or brown (incandescent light), Hardness: 8, Refractive index: 1.74 1.77, Density: 3.68 3.80, Chemical composition: BeAl2O4, Crystal structure: orthorhombic, Origins: Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma

Afghanistan

1.2 Color

Green

Violet, Blue, White

1.3 Streak

Not Available

Blue

1.4 For which Rashi?

Scorpio

Sagittarius

1.5 Planet

Venus

1.6 Element of Planets

Earth

Water

1.7 How to Wear?

1.7.1 Finger

Not Available

1.7.2 Ring Metal

Not Available

1.8 Energy

Projective, Receptive

Receptive

1.9 Deities

Not Available

Venus

1.10 Not to wear with

Not Available

1.11 Powers

Love

Protection, Courage

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

3.69-3.812.50-3.00

1 7.18

2.5 Fracture

Not Available

Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

2.6 Cleavage

1,1 ; 3,2.

3,6

2.7 Mohs Hardness

8.55.5

2 10

2.8 Chemical Composition

BeAl ₂ O ₄

The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

3 Optical Properties

3.1 Luster

Vitreous

Vitreous, Greasy

3.2 Pleochroism

Not Available

AbsentWalter Schumann

3.3 Dispersion

NANone

0.007 1

3.4 Transparency

Transparent, Transparent to nearly opaque

Opaque

3.5 Refractive Index

1.739-1.7701.500-1.670

1 3.25

3.6 Optic Character

Biaxial/+

Not Available

3.7 Crystal System

Orthorhombic

Trigonal

3.8 Birefringence

0.007-0.010Not Available

0 0.296

3.9 Clarity

Transparent

Gemstones of the world (2001)

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

Alexandrite Vs Lapis lazuli Fracture

Fracture is an important parameter when you compare Alexandrite and Lapis lazuli Physical Properties. It is necessary to understand the significance of these properties, before you compare Alexandrite Vs Lapis lazuli 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. Lapis lazuli fracture is ConchoidalWalter Schumann, Gemstones of the world (2001) and Uneven-Conchoidal.

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Alexandrite Vs Lapis lazuli Luster

A primary knowledge about Alexandrite vs Lapis lazuli 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. Alexandrite exhibits Vitreous luster. Lapis lazuli, on other hand, exhibits Greasy and Vitreous luster.