Grossular

Common Opal

Grossular Vs Common Opal

Grossular

Common Opal

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Astrology

Origin

Sri Lanka, India, Brazil

Southern and central Africa

Color

Green, Brown, Colorless, gray, Yellow

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

Streak

Brownish, White

For which Rashi?

Planet

Element of Planets

Energy

How to Wear?

Finger

Ring Metal

Deities

Not to wear with

Powers

Birthstone

Planetary

Talisman

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.55-3.731.98-2.50

1 7.18

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Fracture

Conchoidal, Uneven

Conchoidal

Cleavage

none

None

Mohs Hardness

7-7.55.5-6.5

2 10

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Chemical Composition

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

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Optical Properties

Luster

Greasy, Vitreous

Pleochroism

None

Dispersion

0.020.01

0.005 1

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Transparency

Translucent

Refractive Index

1.730-1.7601.37-1.52

1 3.25

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Optic Character

Crystal System

cubic

Birefringence

0.020-9999

0 0.296

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Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Translucent

Benefits

Physical

Neurological

Cardiovascular

Respiratory

Good

Reproductive

Helps in digestion and alleviates indigestion

Digestive

Psychology

Abundance

Creativity

Healing

Physical healing

Emotional healing

Qualities Associated

Abundance

Creativity

Grossular Vs Common Opal Fracture

Fracture is an important parameter when you compare Grossular and Common Opal Physical Properties. It is necessary to understand the significance of these properties, before you compare Grossular Vs Common Opal 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 Grossular is Conchoidal and Uneven. Common Opal fracture is Conchoidal.

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Grossular Vs Common Opal Luster

A primary knowledge about Grossular vs Common Opal 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 exhibits Greasy and Vitreous luster.