Clean
Gems without inclusions.
Eye Clean
Gems where (possible) inclusions cannot be seen with the naked eye.
Very Slight Inclusions
Small inclusions that are visible to the trained eye or when viewed under 10 x magnification.
Slight Inclusions
Inclusions that can be seen with the naked eye.
Included
Clear inclusions that can be seen with the naked eye.
Transparent
Gems which allow light to pass through without diffusing (scattering) it.
Translucent
Gems which allow light to pass through with diffusing (scattering) it.
Opaque
Gems which do not allow light to pass through.
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