Celestite | Gemopedia

Celestite, also called celestine, is named for the Latin coelestis, meaning "heavenly," in reference to its often sky-blue color. This unique gem often forms beautiful transparent to blue tabular crystals, but it can also be colorless, white, light red, green, blue or brown.
Alternate
Names
Celestine
Colors
Light Blue, Orange, Brown, Yellow, Green

Celestite Classification

Common Name

Celestite

Species

Celestite

Variety

Colors

Light Blue, Orange, Brown, Yellow, Green

Alternate Names

Celestine

Gemstone Groups

Key Separations

RI, birefringence and optic character

Comments

Some celestite might lose color upon heating or exposure to sunlight.

Celestite Optical Properties

Transparency

Transparent - Translucent

Refractive Index

1.619-1.635

Birefringence

0.01-0.012

Optic Character

Biaxial

Optic Sign

Positive

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: Inert to weak display same as bodycolorMight phosphoresce
LWUV: Inert to weak display same as bodycolorMight phosphoresce

CCF Reaction

Pleochroism

Trichroic, unobservable or weak, varying shades of body color

Dispersion

Strength: none

Comments

Celestite Chemistry & Crystallography

Chemical Name

strontium sulfate

Chemical Formula

SrSO4

Synthesis

Crystal System

Orthorhombic

Classification

Sulfate

Nature

Natural

Crystallinity

Crystalline

Comments

Celestite Characteristic Physical Properties

Hardness

3-3.5

Streak

White

Specific Gravity

3.97-4

Toughness

Poor

Inclusions

Celestite is a rare mineral that can contain liquid inclusions and partially healed fractures.

Luster

Vitreous

Stability

Fracture

Uneven

Cleavage

Perfect, in one direction, Good, in one direction, 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