Black Opal

Grossular

Black Opal Vs Grossular

Black Opal

Grossular

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1 Astrology

1.1 Origin

Australia

Sri Lanka, India, Brazil

1.2 Color

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

Green, Brown, Brown, Colorless, Green, gray, Yellow

1.3 Streak

Not Available

Brownish, White, Brownish, White

1.4 For which Rashi?

Not Available

1.5 Planet

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

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

1.97-2.223.55-3.73

1 7.18

2.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

2.6 Cleavage

Not Available

none

2.7 Mohs Hardness

6-6.57-7.5

2 10

2.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

3 Optical Properties

3.1 Luster

Not Available

Greasy, Vitreous

3.2 Pleochroism

AbsentWalter Schumann

None

3.3 Dispersion

None0.02

0.007 1

3.4 Transparency

Transparent, Translucent

Gemmological Tables (2004) More from other references

3.5 Refractive Index

1.370-1.4701.730-1.760

1 3.25

3.6 Optic Character

Not Available

3.7 Crystal System

Not Available

cubic

3.8 Birefringence

Not Available0.020

0 0.296

3.9 Clarity

Transparent

TransparentUlrich Henn and Claudio C. Milisenda

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

Black Opal Vs Grossular Fracture

Fracture is an important parameter when you compare Black Opal and Grossular Physical Properties. It is necessary to understand the significance of these properties, before you compare Black Opal Vs Grossular 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 Black Opal is ConchoidalArthur Thomas, ConchoidalArthur Thomas, Gemstones (2009) and Gemstones (2009). Grossular fracture is Brittle, Conchoidal, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven.

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Black Opal Vs Grossular Luster

A primary knowledge about Black Opal vs Grossular 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. Grossular, on other hand, exhibits Greasy and Vitreous luster.