Azurmalachite | Gemopedia

This trade name refers to a natural mixture of azurite and malachite that is often banded and can be used as both a gemstone or in decorative items. The bold greens and blues beautifully intertwine to form unique mineral specimens or gems, each piece always one-of-a-kind.
Colors
Blue, Green Banded Material

Azurmalachite Classification

Common Name

Azurmalachite

Species

Azurite, Malachite

Variety

Colors

Blue, Green Banded Material

Alternate Names

Gemstone Groups

Key Separations

Appearance, RI, birefringence.

Comments

Since this stone is a combination of azurite and malachite it displays properties of both stones. RI: azurite 1.730 to 1.836 / malachite 1.655 to 1.909. Birefringence: azurite 0.106 / malachite 0.254. SG: azurite 3.80 (+0.09/-0.50) / malachite 3.95 (+0.15/-0.70)

Azurmalachite Optical Properties

Transparency

Opaque

Refractive Index

Over The Limit 1.655-1.909
Tolerance:(+0.010/-0.010)

Birefringence

0.106-0.254

Optic Character

Biaxial

Optic Sign

Positive

Polariscope Reaction

Aggregate (AGG)

Fluorescence

SWUV: Inert
LWUV: Inert

CCF Reaction

Pleochroism

None

Dispersion

Comments

Azurmalachite Chemistry & Crystallography

Chemical Name

copper carbonate hydroxide

Chemical Formula

Cu3(CO3)2(OH)2 and Cu2Co3(OH)2

Synthesis

Crystal System

Monoclinic

Classification

Carbonate

Nature

Natural

Crystallinity

Aggregate

Comments

Azurmalachite Characteristic Physical Properties

Hardness

3.5-4

Streak

Light Blue To Light Green

Specific Gravity

3.7-3.95 Typical:3.8

Toughness

Poor

Inclusions

Azurmalachite displays botryoidal growth or circular growth in green and blue. If the stone is stabilized it will appear compressed and have signs of polymer.

Luster

Vitreous

Stability

Poor

Fracture

Conchoidal, Uneven

Cleavage

None

Comments

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