Sodalite-Single Crystal | Gemopedia

Sodalite is a mineral used most often for carvings and some types of jewelry. Known for its rich, royal blue hues, sodalite is found in limited areas of the world. Frequently mottled with white veins of calcite, sodalite resembles lapis lazuli in appearance and has been mistaken for it at times. It can occur not only as blue, but also in crystals of gray, yellow, green or pink color.
Alternate
Names
Hackmanite
Colors
Light To Dark Blue, Azure Blue, Colorless, White, Yellowish, Greenish, Gray, Pink

Sodalite-Single Crystal Classification

Common Name

Sodalite-Single Crystal

Species

Sodalite

Variety

Single-Crystal Sodalite

Colors

Light To Dark Blue, Azure Blue, Colorless, White, Yellowish, Greenish, Gray, Pink

Alternate Names

Hackmanite

Gemstone Groups

Key Separations

RI, SG, appearance and possibly fluorescence

Comments

Hackmanite is the pink variety of sodalite.

Sodalite-Single Crystal Optical Properties

Transparency

Transparent - Translucent

Refractive Index

1.483
Tolerance:(+0.004/-0.004)

Birefringence

Optic Character

NA

Optic Sign

NA

Polariscope Reaction

Singly Refractive (SR)

Fluorescence

SWUV: moderate orange, green, or yellowish white
LWUV: Inert to weak orange

CCF Reaction

Pleochroism

None

Dispersion

Strength: moderate fire Value: 0.018

Comments

Sodalite-Single Crystal Chemistry & Crystallography

Chemical Name

chloric sodium aluminum silicate

Chemical Formula

Na8Al6Si6O24Cl2

Synthesis

Crystal System

Cubic

Classification

Silicate

Nature

Natural

Crystallinity

Crystalline

Comments

Sodalite-Single Crystal Characteristic Physical Properties

Hardness

5-6

Streak

White

Specific Gravity

2.15-2.4 Typical:2.25

Toughness

Poor

Inclusions

Transparent sodalite sometimes has small black inclusions.

Luster

Vitreous

Stability

Fracture

Uneven

Cleavage

Poor, 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