Spinel

Lapis lazuli

Spinel Vs Lapis lazuli

Spinel

Lapis lazuli

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1 Astrology

1.1 Origin

Brazil, USA, Madagascar, Sri Lanka, Burma, Thailand, Cambodia, Afghanistan, Russia

Afghanistan

1.2 Color

Blue, Violet, Colorless, Red, Green, Brown

Violet, Blue, White

1.3 Streak

White

Blue

1.4 For which Rashi?

Sagittarius, Scorpio, Sagittarius, Scorpio, Sagittarius, Scorpio

Sagittarius

1.5 Planet

Pluto

Venus

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

Projective

Receptive

1.9 Deities

Hephaestus

Venus

1.10 Not to wear with

Not Available

1.11 Powers

Money

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

none

Not Available

2.3 Durability

Not Available

2.4 Specific Gravity

3.64-3.662.50-3.00

1 7.18

2.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

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

2.6 Cleavage

None, but may exhibit slight parting

3,6

2.7 Mohs Hardness

85.5

2 10

2.8 Chemical Composition

MgAl₂O₄

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

Absent

AbsentWalter Schumann

3.3 Dispersion

0.02None

0.007 1

3.4 Transparency

Transparent, Translucent, Transparent to translucent

Opaque

3.5 Refractive Index

1.731.500-1.670

1 3.25

3.6 Optic Character

Not Available

3.7 Crystal System

Isometric

Trigonal

3.8 Birefringence

Not AvailableNot Available

0 0.296

3.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

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

Spinel Vs Lapis lazuli Fracture

Fracture is an important parameter when you compare Spinel and Lapis lazuli Physical Properties. It is necessary to understand the significance of these properties, before you compare Spinel 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. Fracture observed in Spinel is Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven. Lapis lazuli fracture is ConchoidalWalter Schumann, Gemstones of the world (2001) and Uneven-Conchoidal.

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Spinel Vs Lapis lazuli Luster

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