Chlorite In Quartz | Gemopedia

When chlorite occurs as an inclusion within quartz, it gives the gem a green color and may cause phantom growths, as seen by the ghost-like layers of crystal left behind as the crystal grew in stages.
Colors
Brown, Tan, Gray

Chlorite In Quartz Classification

Common Name

Chlorite In Quartz

Species

Quartz

Variety

Colors

Brown, Tan, Gray

Alternate Names

Gemstone Groups

Key Separations

Refractive index, appearance, birefringence

Comments

The chlorite group is made up of several mineral species two of which are clinochlore and chamosite are they are the most common.

Chlorite In Quartz Optical Properties

Transparency

Transparent - Opaque

Refractive Index

1.544-1.553
Tolerance:very constant

Birefringence

0.009

Optic Character

Uniaxial

Optic Sign

Positive

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: Inert
LWUV: Inert

CCF Reaction

Pleochroism

None

Dispersion

Strength: weak fire Value: 0.013

Comments

Chlorite In Quartz Chemistry & Crystallography

Chemical Name

silicon dioxide (aka silica)

Chemical Formula

SiO2

Synthesis

Crystal System

Trigonal

Classification

Silicate

Nature

Natural

Crystallinity

Crystalline to Aggregate

Comments

Chlorite In Quartz Characteristic Physical Properties

Hardness

7

Streak

White

Specific Gravity

2.64-2.69 Typical:2.66

Toughness

Good

Inclusions

Chlorite in quartz will have chlorite group inclusions and they sometimes will contian liquid, two-phase and three-phase inclusions, negative crystals, minerals, needles, rutile, iron particles.

Luster

Dull

Stability

Good

Fracture

Conchoidal

Cleavage

None

Comments

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