Mottramite

Sillimanite

Mottramite Vs Sillimanite

Mottramite

Sillimanite

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Astrology

Origin

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

Color

Brown, Green, Yellow

Blue, Green, Brownish, Greenish, Colorless, gray

Streak

Green, 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

Brittle

Tough

Solubility

Soluble

Durability

Specific Gravity

5.93.20-3.26

1 7.18

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Fracture

Sub-Conchoidal

Splintery

Cleavage

None observed

{010} perfect

Mohs Hardness

36-7.5

2 10

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Chemical Composition

PbCu(VO4)(OH)

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

Optical Properties

Luster

Greasy

Vitreous, Subadamantine, Silky

Pleochroism

Visible X=Y= canary yellow to greenish yellow

Colourless to pale brown to yellow

Dispersion

0.040.02

0.005 1

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Transparency

Transparent, Translucent

Refractive Index

2.1701.653-1.685

1 3.25

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Optic Character

Crystal System

Orthorhombic

Birefringence

0.1500.020-0.022

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Cardiovascular

Respiratory

Good

Reproductive

Digestive

Psychology

Confidence

Creativity

Healing

Emotional healing

Qualities Associated

Transformation

Creativity

Mottramite Vs Sillimanite Fracture

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

Compare Brown Gemstones

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Mottramite Vs Sillimanite Luster

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