---
title: "Emerald oiling: meaning in gemology"
description: "Emerald oiling is filling an emerald's fissures with a colorless oil to make them less visible."
url: https://digitalgemology.com/learn/glossary/emerald-oiling
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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

# Emerald oiling

Also called oiled emerald, oiling

Emerald oiling is filling an emerald's fissures with a colorless oil to make them less visible.

## In more detail

Oil can seep out or dry over time, and steam can make it sweat out. The fissures can then show again, and a jeweler can re-oil the stone. Clean oiled emeralds with warm, soapy water only.

## On a grading report

Fissure filling or clarity enhancement, with its degree. Some labs also name the filler as oil.

## 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.
- [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.
- [Emerald](https://digitalgemology.com/learn/glossary/emerald): Emerald is the green to bluish green variety of the mineral beryl. Chromium, vanadium or both cause its color.
- [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.
- [Stability](https://digitalgemology.com/learn/glossary/stability): Stability is a gem's resistance to damage from heat, light and chemicals.

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