---
title: "Enhancement degree: meaning in gemology"
description: "The enhancement degree is the amount of filler a lab finds in a gem's fissures: minor, moderate or significant."
url: https://digitalgemology.com/learn/glossary/enhancement-degree
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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[Glossary](https://digitalgemology.com/learn/glossary) · Treatments and origin

# Enhancement degree

Also called minor, moderate, significant, F1, F2, F3

The enhancement degree is the amount of filler a lab finds in a gem's fissures: minor, moderate or significant.

## In more detail

LMHC wording codes it F1, F2 and F3 for fissures, and C1 to C3 for filled cavities. Lead-glass filling in corundum uses the same F1 to F3 scale. The degree describes the stone at the time of examination, because fillers can change later.

## On a grading report

For example: 'indications of moderate clarity enhancement/modification', or F2.

## Related terms

- [Clarity enhancement](https://digitalgemology.com/learn/glossary/clarity-enhancement): Clarity enhancement is filling surface-reaching fissures with a filler such as oil, resin, wax or glass, so they show less.
- [Emerald oiling](https://digitalgemology.com/learn/glossary/emerald-oiling): Emerald oiling is filling an emerald's fissures with a colorless oil to make them less visible.
- [Lead-glass filling](https://digitalgemology.com/learn/glossary/lead-glass-filling): Lead-glass filling is a treatment that fills fissures and cavities in corundum, mostly ruby, with high-lead glass to hide them.
- [Resin filling](https://digitalgemology.com/learn/glossary/resin-filling): Resin filling is filling a gem's fissures or cavities with a resin, often one that hardens, to hide them.

[All 328 terms](https://digitalgemology.com/learn/glossary)