Choosing Tanzanite

TANZANITE GRADING SCALE

COLOUR (HUE)
The essential colour of the stone. Tanzanite can show a dominance of either blue or violet. The dominant colour last.

SATURATION
Is strenght/intensity of the colour.

CLARITY
The imperfections that may occur in the stone.

LC – Loupe Clean
EC – Eye Clean
LI – Light Included
MI – Moderately Included
HI – Heavily Included

FINISH
The final polish, symmetry and external characteristics of the stone.

A – Excellent
B – Very Good
C – Good
D – Fair
E – Poor