Malachite | Gemopedia

Malachite is generally opaque and comes in a vivid bluish green to green color. It is usually banded in two or more tones of green and may have a subtle sheen. This gem is a secondary copper mineral and is commonly found in conjunction with azurite, a bold blue copper carbonate mineral. A mix of the two minerals is often called azurmalachite.
Colors
Vivid, Bluish Green To Green, Usually Banded In Two Shades Of Green

Malachite Classification

Common Name

Malachite

Species

Malachite

Variety

Colors

Vivid, Bluish Green To Green, Usually Banded In Two Shades Of Green

Alternate Names

Gemstone Groups

Key Separations

RI, birefringence blink and appearance

Comments

Misnomer: pseudo-emerald

Malachite Optical Properties

Transparency

Opaque

Refractive Index

Over the Limit 1.655-1.909

Birefringence

0.254

Optic Character

Optic Sign

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: inert
LWUV: inert

CCF Reaction

Pleochroism

None

Dispersion

Comments

Malachite Chemistry & Crystallography

Chemical Name

copper carbonate hydroxide

Chemical Formula

Cu2CO3(OH)2

Synthesis

Crystal System

Monoclinic

Classification

Carbonate

Nature

Natural

Crystallinity

Aggregate

Comments

Malachite Characteristic Physical Properties

Hardness

3.5-4

Streak

Light Green

Specific Gravity

3.25-4.1 Typical:3.95

Toughness

Poor

Inclusions

Malachite is often seen with botryoidal growth, curved or angular banding alternating between lighter and darker shades of green. Stones may have fibrous structure and sheen. Stones might show scratches and dull polish due to low mohs hardness.

Luster

Vitreous

Stability

Fracture

Uneven, Splintery

Cleavage

Perfect, in one direction, Good, in one direction

Comments

JTV on Google+
0 Items
My Wish List
Close
Item
Description
Qty.
Price


Estimated Order Total:
0
Total Due Today:
0
Close
Item
Description
Qty.
Price


Page of 1