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.
The Blue Man. Internal diffusion creates a fanciful pattern within this heat-treated sapphire from the Isle of Gems.
Natural Sapphire •
Sri Lanka (Ceylon) •
Enhancements:
Heat (H) •
Lighting Conditions:
Fiber Optic: Oblique
Photographer:
Richard W. Hughes •
Image Number:
A-001-1888-1
Koivula, J.I. (1987) Internal diffusion. Journal of Gemmology, Vol. 20, No. 7/8, pp. 474–477; RWHL*.
A classic example of a heat-altered fingerprint. One can clearly see that each of the negative crystal channels has burst from the heat treatment.
Natural Sapphire •
Sri Lanka (Ceylon) •
Enhancements:
Heat (H) •
Lighting Conditions:
Fiber Optic: Oblique
Photographer:
E. Billie Hughes •
Image Number:
A-001-1910-2
A classic example of a heat-altered fingerprint. One can clearly see that each of the negative crystal channels has burst from the heat treatment.
Natural Sapphire •
Sri Lanka (Ceylon) •
Enhancements:
Heat (H) •
Lighting Conditions:
Fiber Optic: Transmitted
Photographer:
E. Billie Hughes •
Image Number:
A-001-1910-1
Negative crystals seeking the surface in this natural Sri Lanka sapphire. In many cases, negative crystals cannot withstand high-temperature heating and so when they are found in an undamaged state, represent strong indications that the gem has not undergone heat treatment.
Natural Sapphire •
Sri Lanka (Ceylon) •
Enhancements:
None Detected (None) •
Lighting Conditions:
Fiber Optic: Transmitted
Photographer:
Wimon Manorotkul •
Image Number:
P-10135-1
A superb fixed star is seen in this trapiche sapphire from Mogok, Burma.
Natural Trapiche Sapphire •
Myanmar (Burma); Mogok •
Enhancements:
None Detected (None) •
Lighting Conditions:
Light Field (Transmitted Light)
Photographer:
Richard W. Hughes •
Image Number:
P-10137-1
Irregular inclusions of unknown nature lying in the basal plane are seen in reflected light within this heat-treated Sri Lanka sapphire. These have sometimes been associated with beryllium diffusion, but are not diagnostic for it.
Natural Sapphire •
Sri Lanka (Ceylon) •
Enhancements:
Heat (H) •
Lighting Conditions:
Fiber Optic: Diffuse Overhead
Photographer:
Richard W. Hughes •
Image Number:
P-10129-1
http://www.ruby-sapphire.com/beryllium-treated-blue-sapphire.htm
Polysynthetic twinning is seen in dramatic relief within this Kashmir (India) sapphire when viewed between crossed polars.
Natural Sapphire •
India (Kashmir) •
Enhancements:
None Detected (None) •
Lighting Conditions:
Diffuse Light Field + Crossed Polars
Photographer:
Richard W. Hughes •
Image Number:
A-001-1807-1
Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.
Two small growth twins near the culet are revealed by examination between crossed polars in this rare sapphire from Kashmir (India).
Natural Sapphire •
India (Kashmir) •
Enhancements:
None Detected (None) •
Lighting Conditions:
Diffuse Light Field + Crossed Polars
Photographer:
Richard W. Hughes •
Image Number:
A-001-1808-1
Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.
Balloons on a string. Unusual crystals of what may be apatite with attached growth tube strings in a purple star sapphire from Sri Lanka.
Natural Star Sapphire •
Sri Lanka (Ceylon) •
Enhancements:
None Detected (None) •
Lighting Conditions:
Fiber Optic: Transmitted
Photographer:
Richard W. Hughes •
Image Number:
A-001-1692-2
Unusual crystals of what may be apatite with attached growth tubes in a purple star sapphire from Sri Lanka.
Natural Star Sapphire •
Sri Lanka (Ceylon) •
Enhancements:
None Detected (None) •
Lighting Conditions:
Fiber Optic: Transmitted
Photographer:
Richard W. Hughes •
Image Number:
A-001-1692-1
A single twin plane stands out in brilliant contrast when examined between crossed polars in this star sapphire from Sri Lanka.
Natural Star Sapphire •
Sri Lanka (Ceylon) •
Enhancements:
None Detected (None) •
Lighting Conditions:
Diffuse Light Field + Crossed Polars
Photographer:
E. Billie Hughes •
Image Number:
A-001-1698-3
Otherworldly birefringent crystals float above a twin plane in a sapphire from Sri Lanka.
Natural Star Sapphire •
Sri Lanka (Ceylon) •
Enhancements:
None Detected (None) •
Lighting Conditions:
Diffuse Light Field + Crossed Polars
Photographer:
E. Billie Hughes •
Image Number:
A-001-1698-2
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.
