Melbourne client care · Made in Surat
The oil slick effect is a visible rainbow sheen that can appear on the surface of a moissanite when certain oils coat the stone. It is not permanent damage. It washes off completely. This guide explains what causes it, how to prevent it and how to remove it.
The oil slick effect refers to a visible interference pattern — a rainbow-like iridescent sheen — that appears on the surface of a moissanite when a thin film of oil or similar substance coats the stone. It looks similar to the rainbow you see in a thin film of oil on water — the same physical phenomenon, called thin-film interference, is responsible.
Thin-film interference occurs when light reflects from both the top and bottom of a very thin transparent layer (the oil film on the stone surface). The two reflected beams interfere with each other and produce visible colour bands — the characteristic rainbow pattern.
This is not damage to the stone. The stone itself is unchanged. The effect disappears completely when the film is removed — which a mild soap and warm water clean achieves entirely.
The oil slick is caused by any substance that creates a thin, uniform film on the moissanite surface. Specific products are more likely to cause it than others.
The oil slick is easy to remove. A mild soap and warm water clean dissolves the film entirely.
Prevention is straightforward: apply any oil-based product before putting the ring on, not after.
Book a free online consultation. Yash Chandpara covers moissanite care fully — including the oil slick, cloudiness and everything else your ring needs.
