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Opal Triplet 20x15mm Gem Grade Lot:101 |
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Click Thumbnails below for more large pictures of this Opal Triplet
Body Tone

Brightness of Fire
... The other criterion is the brightness of the fire. Brightness is graded on a scale of 1 to 5.
| Level: | Name: | Description: |
|---|---|---|
| 1 | Faint | Shows a little play of color only under direct sunlight, none under low light |
| 2 | Dull | Shows some color under low light, but is dull even under indirect sunlight |
| 3 | Bright | Shows fair color under low light and very nice fire under indirect sunlight |
| 4 | Very Bright | Shows good color under low light and sharp crisp color under indirect sunlight |
| 5 | Brilliant | Shows exceptionally bright crisp color in all lighting situations |
Our Grading System for Opal triplets
Gem Our best Opals
AA Excellent quality
A High quality
B Average Quality
C Commercial Grade.
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