Cobaltocalcite | Gemopedia

Cobaltocalcite refers to a stunning pink-red to slightly purplish-red cobalt-rich calcite mineral. Another name for this stone is cobaltoan calcite. Crystals often form as drusy masses and when faceted, gems are rarely seen in sizes greater than 2 carats.
Alternate
Names
Spherocobaltite
Colors
Violet Red, Pale Pink, Pink, Rose Red, Gray, Brownish, Black

Cobaltocalcite Classification

Common Name

Cobaltocalcite

Species

Calcite

Variety

Cobaltocalcite

Colors

Violet Red, Pale Pink, Pink, Rose Red, Gray, Brownish, Black

Alternate Names

Spherocobaltite

Gemstone Groups

Calcite

Key Separations

Comments

Cobaltocalcite Optical Properties

Transparency

Transparent - Translucent

Refractive Index

Over the Limit 1.6-1.885

Birefringence

0.285

Optic Character

Uniaxial

Optic Sign

Negative

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV:
LWUV:

CCF Reaction

Pleochroism

Dichroic, violet red to rose red

Dispersion

Strength: strong fire

Comments

Cobaltocalcite Chemistry & Crystallography

Chemical Name

Chemical Formula

CoCO3

Synthesis

Crystal System

Trigonal

Classification

Carbonate

Nature

Natural

Crystallinity

Crystalline

Comments

Cobaltocalcite Characteristic Physical Properties

Hardness

3-4

Streak

Specific Gravity

4.1-4.13

Toughness

Poor

Inclusions

Luster

Stability

Fracture

Subconchoidal

Cleavage

Perfect, in three directions

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