Hollandite

Sillimanite

Hollandite Vs Sillimanite

Hollandite

Sillimanite

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Astrology

Origin

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

Color

Grey, Black, gray

Blue, Green, Brownish, Greenish, Colorless, gray

Streak

Black

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

5.053.20-3.26

1 7.18

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Fracture

Splintery

Cleavage

Distinct / Good, Prismatic

{010} perfect

Mohs Hardness

4-66-7.5

2 10

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Chemical Composition

Ba(Mn++++,Mn++)8O16

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

Optical Properties

Luster

Vitreous, Subadamantine, Silky

Pleochroism

Weak.

Colourless to pale brown to yellow

Dispersion

0.030.02

0.005 1

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Transparency

Transparent, Translucent

Refractive Index

-99991.653-1.685

1 3.25

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Optic Character

Crystal System

monoclinic

Orthorhombic

Birefringence

-99990.020-0.022

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Respiratory

Poor

Good

Reproductive

Digestive

Psychology

Transformation

Creativity

Healing

Emotional healing

Qualities Associated

Transformation

Creativity

Hollandite Vs Sillimanite Fracture

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

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Hollandite Vs Sillimanite Luster

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