Common Opal

Grandidierite

Common Opal Vs Grandidierite

Common Opal

Grandidierite

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Astrology

Origin

Southern and central Africa

Madagascar

Color

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

Green

Streak

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

1.98-2.502.85-3.00

1 7.18

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Fracture

Conchoidal

Uneven

Cleavage

None

Perfect

Mohs Hardness

5.5-6.57.5

2 10

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Chemical Composition

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

(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

Optical Properties

Luster

Vitreous, Pearly

Pleochroism

visible

Dispersion

0.010.04

0.005 1

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Transparency

Translucent

Refractive Index

1.37-1.521.578-1.639

1 3.25

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Optic Character

Crystal System

Orthorhombic

Birefringence

-99990.037-0.039

0 0.296

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Clarity

Translucent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Respiratory

Good

Reproductive

Digestive

Psychology

Creativity

Wisdom

Healing

Emotional healing

Physical healing

Qualities Associated

Creativity

Harmony

Common Opal Vs Grandidierite Fracture

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

Compare Blue Gemstones

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Common Opal Vs Grandidierite Luster

A primary knowledge about Common Opal vs Grandidierite 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. Grandidierite, on other hand, exhibits Vitreous and Pearly luster.