Taaffeite | Gemopedia

A rare and beautiful mineral, taaffeite is a lilac to mauve, brown to red, bluish green crystal that may be transparent to translucent in appearance. Interestingly enough, this gem was first discovered as a faceted gemstone that was thought to be spinel. Eventually, the mineral was found in Sri Lanka.
Colors
Pink To Red, Blue, Violet, Purple, Brown, Colorless

Taaffeite Classification

Common Name

Taaffeite

Species

Taaffeite

Variety

Colors

Pink To Red, Blue, Violet, Purple, Brown, Colorless

Alternate Names

Gemstone Groups

Key Separations

RI, birefringence and optic character

Comments

Taaffeite Optical Properties

Transparency

Transparent

Refractive Index

1.719-1.723
Tolerance:(+0.002/-0.002)

Birefringence

0.004-0.005

Optic Character

Uniaxial

Optic Sign

Negative

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: Inert to weak green
LWUV: Inert to weak green

CCF Reaction

Pleochroism

Unobservable

Dispersion

Strength: weak fire Value: 0.019

Comments

Taaffeite Chemistry & Crystallography

Chemical Name

magnesium aluminum beryllium oxide

Chemical Formula

MgBeAl4O8

Synthesis

Crystal System

Hexagonal

Classification

Oxide

Nature

Natural

Crystallinity

Crystalline

Comments

Taaffeite Characteristic Physical Properties

Hardness

8-8.5

Streak

White

Specific Gravity

3.6-3.62 Typical:3.61

Toughness

Good

Inclusions

Taaffeite might contain healing cracks, crystal inclusions and natural inclusions

Luster

Vitreous

Stability

Fracture

Conchoidal

Cleavage

None

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