Synthetic Flux Ruby Inclusions

First Published: 7 September 2026

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

Synthetic Flux Ruby Inclusions

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

Flux “icicles” in a Kashan flux synthetic ruby.
Fine streams of “rain-like” particles in a heated flux grown synthetic ruby.
Fine streams of “rain-like” particles in a heated flux grown synthetic ruby.
Frosty “flux icicles” in a heated flux grown synthetic ruby.
A melted fingerprint with drippy channels in a heated flux grown synthetic ruby.
Not all synthetic rubies have curved growth zoning. This Ramaura flux synthetic shows angular growth markings on its surface. Specimen courtesy Nicolas Francfort.
Triangular growth zoning and orangey red flux crystals are a hallmark of flux synthetic ruby. This sample was produced by Ramaura. Specimen courtesy Nicolas Francfort.
Triangular growth zoning and orangey red flux crystals are a hallmark of flux synthetic ruby. This sample was produced by Ramaura. Specimen courtesy Nicolas Francfort.
While straight growth zoning is often seen as a sign that corundum is natural, this is not always. This flux synthetic ruby displays sharp straight growth zoning.
Whitish, flux filled cavities in a flux synthetic ruby display a melted appearance.
A string of small flux filled cavities stands out in this flux synthetic ruby.
“Hairpin” or “comet” -type flux inclusions in a Kashan flux-grown synthetic ruby. They are compposed of a larger flux droplet and smaller flux particles forming the tails along the growth direction.

Search the Complete Hyperion Database

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

Synthetic Flux Ruby Inclusion Photomicrographs

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

What Inclusions Can Reveal About Synthetic Flux Ruby

Microscopic examination helps distinguish flux-grown synthetic ruby 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 flux-grown synthetic ruby 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.