Bertrandite

Dravite

Bertrandite Vs Dravite

Bertrandite

Dravite

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Astrology

Origin

Southern and central Africa

Color

Colorless, Yellow

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

Streak

White

Colorless

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

2.59-2.603.03-3.18

1 7.18

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Fracture

Uneven, Irregular, Conchoidal

Cleavage

{001} Perfect, {110} Distinct, {101} Distinct

{???} Indistinct

Mohs Hardness

6-77-7.5

2 10

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Chemical Composition

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Optical Properties

Luster

Vitreous

Pleochroism

none.

Very strong: pale yellow colorless

Dispersion

0.010.02

0.005 1

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Transparency

TransparentAnthony et al

Transparent

Refractive Index

1.583-1.6141.614-1.666

1 3.25

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Optic Character

Crystal System

Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21

Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

Birefringence

-99990.014-0.032

0 0.296

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Clarity

TransparentAnthony et al

Transparent

Benefits

Physical

Neurological

Cardiovascular

Promotes mental clarity

Respiratory

Reproductive

Digestive

Psychology

Harmony

Self-acceptance

Healing

Emotional healing

Qualities Associated

Creativity

Self-Exploration

Bertrandite Vs Dravite Fracture

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

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Bertrandite Vs Dravite Luster

A primary knowledge about Bertrandite vs Dravite 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. Bertrandite exhibits Vitreous luster. Dravite, on other hand, exhibits Vitreous luster.