---
title: "Resin filling: meaning in gemology"
description: "Resin filling is filling a gem's fissures or cavities with a resin, often one that hardens, to hide them."
url: https://digitalgemology.com/learn/glossary/resin-filling
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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

# Resin filling

Also called polymer filling, artificial resin

Resin filling is filling a gem's fissures or cavities with a resin, often one that hardens, to hide them.

## In more detail

It is common in emerald. Resin can deteriorate over time. A colored resin also changes the color, and the lab then reports a colored filler.

## On a grading report

Fissure filling with its amount (F1 to F3), or cavity filling (C1 to C3). A colored filler is reported as such.

## 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.
- [Manufactured product](https://digitalgemology.com/learn/glossary/manufactured-product): A manufactured product is a gem held together by glass or resin. It is made from badly fractured rough, or from many small pieces bound into one.
- [Enhancement degree](https://digitalgemology.com/learn/glossary/enhancement-degree): The enhancement degree is the amount of filler a lab finds in a gem's fissures: minor, moderate or significant.

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