Grandidierite

Sillimanite

Grandidierite Vs Sillimanite

Grandidierite

Sillimanite

Add ⊕

Astrology

Origin

Madagascar

USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil

Color

Green

Blue, Green, Brownish, Greenish, Colorless, gray

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

Tough

Solubility

Durability

Specific Gravity

2.85-3.003.20-3.26

1 7.18

👆🏻

Fracture

Uneven

Splintery

Cleavage

Perfect

{010} perfect

Mohs Hardness

7.56-7.5

2 10

👆🏻

Chemical Composition

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

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Optical Properties

Luster

Vitreous, Pearly

Vitreous, Subadamantine, Silky

Pleochroism

visible

Colourless to pale brown to yellow

Dispersion

0.040.02

0.005 1

👆🏻

Transparency

Transparent, Translucent

Refractive Index

1.578-1.6391.653-1.685

1 3.25

👆🏻

Optic Character

Crystal System

Orthorhombic

Birefringence

0.037-0.0390.020-0.022

0 0.296

👆🏻

Clarity

Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Respiratory

Good

Reproductive

Digestive

Psychology

Wisdom

Creativity

Healing

Physical healing

Emotional healing

Qualities Associated

Harmony

Creativity

Grandidierite Vs Sillimanite Fracture

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

Compare Green Gemstones

Grandidierite Vs Hurlbutite

Grandidierite Vs Kornerupine

Grandidierite Vs Kyanite Cyprine

Grandidierite Vs Sillimanite Luster

A primary knowledge about Grandidierite vs Sillimanite 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 exhibits Vitreous and Pearly luster. Sillimanite, on other hand, exhibits Vitreous, Subadamantine and Silky luster.