Synthetic Sapphire Inclusions

First Published: 7 September 2026

Synthetic Sapphire Inclusions

Explore inclusions and internal features in synthetic sapphire in Hyperion, the Lotus Gemology inclusion database. Photomicrographs are accompanied by descriptive information and published references where available.

This piece of Verneuil flame fusion synthetic sapphire was treated to make it look like a natural stone. However, the charade is over when the stone is viewed under shortwave ultraviolet light: it displays a chalky fluorescence that is seen in many Verneuil synthetics. (Note that natural stones may also display a chalky fluorescence, but it is usually in a zoned pattern.)
At first glance this Verneuil flame fusion synthetic pink sapphire makes for a convincing piece of natural sapphire rough. The stone has been treated to have a rough surface, complete with naturals with residues inside them meant to look like dirt or matrix. Substances such as shoe polish may be used on the outside of synthetic “rough” to make it look like natural material.
With magnification, curved straie can be seen in this piece of Verneuil flame-fusion synthetic sapphire that was masquerading as a piece of natural rough.

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Inclusions and growth features in synthetic sapphire can provide evidence of laboratory growth. Their appearance and associations should be evaluated together with other gemological observations when identifying the material.

Synthetic Sapphire Inclusion Photomicrographs

The Hyperion gallery presents microscopic features documented in synthetic sapphire. Each entry includes descriptive information and references to the gemological literature where available.

What Inclusions Can Reveal About Synthetic Sapphire

Microscopic examination helps distinguish synthetic sapphire from natural material. Inclusions and growth structures are considered alongside other gemological properties when assessing evidence of synthetic origin.

Hyperion combines inclusion photomicrography with supporting gemological information, allowing features in synthetic sapphire to be compared with documented examples.

About Hyperion

Hyperion is the Lotus Gemology searchable inclusion database. It allows users to browse gemstone inclusions by gem type, geographic origin, treatment and keyword.