Sapphire Inclusions
Explore sapphire inclusions in Hyperion, the Lotus Gemology inclusion database. Hyperion contains photomicrographs of inclusions and internal features in natural sapphire, documented with information on geographic origin, treatment, lighting conditions, field of view, photographer and published references.
A high-relief crystal shines in this unheated sapphire from Burma.
Natural Sapphire •
Myanmar (Burma); Mogok •
Enhancements:
None Detected (None) •
Lighting Conditions:
Dark Field + Diffuse Fiber Optic
Photographer:
E. Billie Hughes •
Image Number:
A-001-5566-1
An iridescent healed fissure demonstrates the underlying atomic symmetry, suggesting this formed along a pyramid or rhombohedron face.
Natural Sapphire •
Sri Lanka (Ceylon) •
Enhancements:
None Detected (None) •
Lighting Conditions:
Fiber Optic: Oblique
Photographer:
Patharaphum Sudprasert •
Image Number:
A-001-5940-1
These long growth tubes with glassy areas show clear signs of heat alteration.
Natural Sapphire •
Madagascar •
Enhancements:
Heat (H) •
Lighting Conditions:
Dark Field
Photographer:
E. Billie Hughes •
Image Number:
A-001-5414-1
Etch marks of the surface of a natural (in the left portion of the photo), along with a fingerprint inclusion within the gem itself (right side of the photo). Note the identical pattern of the etch marks and the negative crystals within the fingerprint, both reflections of the underlying atomic symmetry.
Natural Sapphire •
Myanmar (Burma); Mogok •
Enhancements:
None Detected (None) •
Lighting Conditions:
Dark Field
Photographer:
E. Billie Hughes •
Image Number:
A-001-5334-4
Polysynthetic twinning in this pink sapphire from Vietnam creates an explosion of color when viewed between crossed polars.
Natural Sapphire •
Vietnam •
Enhancements:
None Detected (None) •
Lighting Conditions:
Diffuse Light Field + Crossed Polars
Photographer:
Richard W. Hughes •
Image Number:
A-001-5699-1
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.
Natural Sapphire •
Madagascar •
Enhancements:
None Detected (None) •
Lighting Conditions:
Dark Field + Shadowing
Photographer:
Richard W. Hughes •
Image Number:
A-001-5693-2
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.
Natural Sapphire •
Madagascar •
Enhancements:
None Detected (None) •
Lighting Conditions:
Dark Field + Shadowing
Photographer:
Richard W. Hughes •
Image Number:
A-001-5693-1
Etch marks of the surface of a natural on a sapphire from Myanmar’s Mogok Stone Tract. The symmetry of the etch marks reveals the underlying atomic symmetry.
Natural Sapphire •
Myanmar (Burma); Mogok •
Enhancements:
None Detected (None) •
Lighting Conditions:
Fiber Optic: Diffuse Overhead
Photographer:
Richard W. Hughes •
Image Number:
A-001-5334-3
Etch marks of the surface of a natural (white areas in the upper left portion of the photo), along with a fingerprint inclusion within the gem itself (right side of the photo). Note the identical pattern of the etch marks and the negative crystals within the fingerprint, both reflections of the underlying atomic symmetry.
Natural Sapphire •
Myanmar (Burma); Mogok •
Enhancements:
None Detected (None) •
Lighting Conditions:
Dark Field + Diffuse Fiber Optic
Photographer:
Richard W. Hughes •
Image Number:
A-001-5334-2
Etch marks of the surface of a natural on a sapphire from Myanmar’s Mogok Stone Tract. The symmetry of the etch marks reveals the underlying atomic symmetry.
Natural Sapphire •
Myanmar (Burma); Mogok •
Enhancements:
None Detected (None) •
Lighting Conditions:
Fiber Optic: Diffuse Overhead
Photographer:
Richard W. Hughes •
Image Number:
A-001-5334-1
A common feature of sapphires from Myanmar’s Mogok Stone Tract is fingerprints composed of well-formed negative crystals. The undamaged nature of the individual cavities is proof that this gem has not been subjected to high temperature heat treatment.
Natural Sapphire •
Myanmar (Burma); Mogok •
Enhancements:
None Detected (None) •
Lighting Conditions:
Dark Field
Photographer:
Richard W. Hughes •
Image Number:
A-001-5361-1
Extremely sharp parallel and angular growth zoning is one of the hallmarks of Madagascar sapphires, as seen here.
Natural Sapphire •
Madagascar •
Enhancements:
None Detected (None) •
Lighting Conditions:
Dark Field + Shadowing
Photographer:
Richard W. Hughes •
Image Number:
A-001-5250-1
Sapphire inclusions may include mineral crystals, rutile silk, healed fissures, fluid inclusions, negative crystals, color zoning and other features formed during or after crystal growth. Such features are important to gemologists because they can provide evidence useful in identifying sapphire, understanding its geological history, recognizing treatment and, in some cases, determining geographic origin.
Sapphire Inclusion Photomicrographs
The Hyperion sapphire gallery includes microscopic features found in sapphires from major deposits around the world. Each entry is accompanied by descriptive information and, where available, references to the gemological literature.
What Inclusions Can Reveal About Sapphire
Inclusions are an important part of sapphire identification. Their form, composition, orientation and alteration can help gemologists distinguish natural sapphire from synthetic material, recognize evidence of heat treatment, and study the geological environment in which the sapphire formed.
Hyperion combines inclusion photomicrography with supporting gemological information so that individual features can be compared with documented examples from known sapphire deposits.
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.
