Opal

Howlite

Opal Vs Howlite

Opal

Howlite

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Astrology

Origin

Ethiopia

Southern and central Africa

Color

Yellow, White, Red, Brown, Blue

Blue, Colorless, White

Streak

White

For which Rashi?

Cancer, Libra, Scorpio

Gemini, Virgo

Planet

Mercury

Element of Planets

Earth, Air, Water

Earth

Energy

How to Wear?

Finger

Ring Metal

Deities

Cupid

Quan Yin

Not to wear with

Powers

Astral Projection, Psychicism

Birthstone

Planetary

Talisman

Physical Properties

Tenacity

BrittleWalter Schumann

Solubility

hot salt water

Durability

Specific Gravity

1.98-2.252.45-2.58

1 7.18

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Fracture

Conchoidal

Cleavage

None

Mohs Hardness

5-6.53-3.5

2 10

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Chemical Composition

SiO₂ · nH₂O

Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Optical Properties

Luster

Vitreous, Pearly

Vitreous

Pleochroism

None

Dispersion

0.010.01

0.005 1

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Transparency

Transparent, Translucent, Transparent to translucent

Refractive Index

1.37-1.521.583-1.608

1 3.25

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Optic Character

Crystal System

Trigonal

monoclinic

Birefringence

-99990.019

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Aids in mental clarity and focus

Cardiovascular

Respiratory

Good

Reproductive

Digestive

Psychology

Creativity

Calming

Healing

Emotional healing

Qualities Associated

Creativity

Calming

Opal Vs Howlite Fracture

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

Compare Semi Precious Gemstones

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Opal Vs Howlite Luster

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