Mozambique Ruby Inclusions

First Published: 7 September 2026

Mozambique Ruby Inclusions

Explore Mozambique ruby inclusions in Hyperion, the Lotus Gemology inclusion database. Hyperion contains photomicrographs of inclusions and internal features in natural rubies from Mozambique, documented with information on treatment, lighting conditions, field of view, photographer and published references.

These disruption cracks are shallow fissures that form as a result of rapid polishing.
A lovely rosette inclusion surrounds a mica crystal in this ruby from Mozambique’s Montepuez region. This “rosette” actually consists of negative crystals flattened in the plane of basal pinacoid (perpendicular to the c axis).
A lovely rosette inclusion surrounds a mica crystal in this ruby from Mozambique’s Montepuez region. This “rosette” actually consists of negative crystals flattened in the plane of basal pinacoid (perpendicular to the c axis).
The fact that this hot pink ruby from Mozambique owes some of its beauty to artificial heat treatment is betrayed by the spall marks on a small natural on the pavilion. Like drops of frozen water, they cannot be scraped off with a dental pick, thus demonstrating that they are the result of heat treatment.
A lovely “rosette” inclusion lights up the interior of this ruby from Montepuez, Mozambique. These inclusions consist of tiny negative crystals flattened in the basal plane, and become iridescent when illuminated in reflected light.
This platelet in a Mozambique ruby shows clear signs of heat treatment. Note the spotted, mottled appearance where the platelet has begun to break down.
In Mozambique rubies, rutile silk typically occurs in different forms, and here we can see two. At left is a zoned cloud of fine particles, while on the right, well developed needles are seen.
This mica crystal has a glassy tension fissure surrounding it, providing evidence that the stone was heated.
When drops of di-iodomethane are placed on the surface of this rather shallow Mozambique ruby and it is examined between crossed polars, small uniaxial interference figures are readily resolved.
Melted crystals and boehmite needles in a heat-treated ruby from Mozambique.
When a Mozambique ruby is heated, the silk may start to break down, resulting if mottling or bubbles appearing in the daughter minerals, as seen here.
When a Mozambique ruby is heated, the silk may start to break down, resulting if mottling or bubbles appearing in the daughter minerals, as seen here.

Mozambique ruby inclusions may include mineral crystals, rutile silk, healed fissures, fluid inclusions, negative crystals, growth features and other internal features formed during or after crystal growth. Such features are important to gemologists because they can provide evidence useful in identifying ruby and evaluating a possible Mozambique origin.

Mozambique Ruby Inclusion Photomicrographs

The Hyperion Mozambique ruby gallery includes microscopic features documented in rubies from Mozambique. Each entry is accompanied by descriptive information and, where available, references to the gemological literature.

What Inclusions Can Reveal About Mozambique Ruby

Inclusions are an important part of geographic origin determination in ruby. Their form, composition, orientation and associations can provide evidence that, when considered together with other gemological properties, may support or contradict a Mozambique origin.

Hyperion combines inclusion photomicrography with supporting gemological information so that individual features can be compared with documented examples from Mozambique rubies.

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.

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