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.

Sharp angular growth zoning is present in this Kashan flux-grown synthetic ruby.
Growth marks on the basal pinacoid of a Douros synthetic ruby.
Two-phase primary flux-filled cavities in a Douros synthetic flux ruby.
Two-phase primary flux-filled cavities in a Douros synthetic flux ruby.
Two-phase primary flux-filled cavities in a Douros synthetic flux ruby.
Two-phase primary flux-filled cavities in a Douros synthetic flux ruby.
Highly reflective platinum plates shine in this Lechleitner flux-grown synthetic ruby.
The most common inclusions in Knischka rubies are platinum plates (small black triangle at the left) and glassy two-phase inclusions (center). These often exhibit a bipyramidal structure.
A small twin crystal attached to a larger Knischka ruby crystal.
The surface of a Knischka synthetic ruby, showing the complex growth structure. Note the highly reflective platinum plates.
Primary flux in Ramaura stones often displays a distinctive yellow-orange color. Note the obvious “crazed” appearance and zoned structure of this large flux inclusion.
A natural on the surface of a cut Ramaura flux ruby.

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.