Madagascar Sapphire Inclusions

First Published: 7 September 2026

Madagascar Sapphire Inclusions

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

A delicate fingerprint decorates the interior of this blue sapphire from Madagascar. This represents a secondary inclusion, one that formed via the healing of a fissure after the host gem had formed. Its undamaged nature demonstrates that this stone has not been subjected to high-temperature heat treatment.
Extremely sharp parallel and angular growth zoning is one of the hallmarks of Madagascar sapphires, as seen here.
Extremely sharp angular growth zoning as is typically seen in Madagascar sapphire.
This image clearly illustrates what master photomicrographer John Koivula has termed “chromophore cannibalization.” As titanium is drawn out of solid solution to form exsolved rutile silk, the area in the vicinity is decolorized, losing its blue color. This is a natural process and is the reverse of “internal diffusion,” where heat treatment sends the titanium back into solution, creating blue clouds or “inkspots” around the rutile remnants.
Surface-conformal color rim in a Madagascar pink sapphire that was diffused with beryllium to give it the appearance of a padparadscha sapphire.
A small crystal leaves a trail in its wake within this sapphire from Madagascar.
Small crystals are connected to the surface of this Madagascar sapphire by tiny growth tubes. Note also the narrow, deeply indented natural at right, another hallmark of Madagascar sapphires.
Rounded zircon inclusions across the entire stone mark this sapphire as being of Madagascar origin. While zircon crystals are also common in sapphires from other sources, they are not seen the same concentration as in Madagascar sapphires.
Multitudes of rounded zircons were found in this blue sapphire from Madagascar, along with undissolved rutile silk.
A birefringent lance pierces the heart of this blue sapphire from Madagascar.
A narrow and deeply indented natural on the girdle of a Madagascar sapphire. These features are quite common on Madagascar sapphires of all colors.
Tiny black dendrites inhabit the sticky blue world of this sapphire from Madagascar, growing amidst the small pockets of undigested fluid in a fingerprint.

Madagascar sapphire 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 sapphire and evaluating a possible Madagascar origin.

Madagascar Sapphire Inclusion Photomicrographs

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

What Inclusions Can Reveal About Madagascar Sapphire

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

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

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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