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.

Rutile silk (high relief) with daughter crystals (lower relief) at the broad ends is a common feature of Mozambique rubies. Heat treatment often produces a breakdown, creating white spots or bubbles within the daughter crystals, as can be seen here.
Rutile silk (high relief) with daughter crystals (lower relief) at the broad ends is a common feature of Mozambique rubies. Heat treatment often produces a breakdown, creating white spots or bubbles within the daughter crystals.
A large gas bubble trapped within the glass filling a large cavity of this treated Mozambique ruby. Flux-healed fingerprints can also be seen nearby.
Flattened gas bubbles within a glass-filled fissure of a treated Mozambique ruby.
A large glass-filled cavity on the surface of this heated ruby from Mozambique. Lower-grade ruby from Mozambique is sometimes treated by both flux healing and glass infilling.
Inclusion of what is probably chalcopyrite in a ruby from Montepuez, Mozambique.
Undissolved rutile silk with attached daughter crystals in the basal plane of a ruby from Mozambique’s Montepuez region.
Inclusions of what is probably pargasite with dark grains of embedded chromite in a ruby from Montepuez, Mozambique.
Inclusions of what is probably pargasite with dark grains of embedded chromite in a ruby from Montepuez, Mozambique.
Probably the most common inclusion in Mozambique ruby is rutile silk. The rutile forms as high-relief twinned needles with tiny re-entrant angles at the broad end, attached to “daughter” crystals of lower relief. During heat treatment, the daughter crystals may show breakdown in the form of bubbles or mottling.
Probably the most common inclusion in Mozambique ruby is rutile silk. The rutile forms as high-relief twinned needles with tiny re-entrant angles at the broad end, attached to “daughter” crystals of lower relief. During heat treatment, the daughter crystals may show breakdown in the form of bubbles or mottling.
Probably the most common inclusion in Mozambique ruby is rutile silk. The rutile forms as high-relief twinned needles with tiny re-entrant angles at the broad end, attached to “daughter” crystals of lower relief. During heat treatment, the daughter crystals may show breakdown in the form of bubbles or mottling.

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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.