Thai Ruby Inclusions
Explore Thai ruby inclusions in Hyperion, the Lotus Gemology inclusion database. Hyperion contains photomicrographs of inclusions and internal features in natural rubies from Thailand, documented with information on treatment, lighting conditions, field of view, photographer and published references.
After this ruby grew, it was exposed to high pressure, causing certain planes of atoms to glide into a twinned position. This secondary “polysynthetic” twinning takes place along the rhombohedron faces and is common in many corundums. Twin planes cross at 86.1 and 93.9° angles.
Natural Ruby •
Thailand/Cambodia •
Enhancements:
Heat (H) •
Lighting Conditions:
Diffuse Light Field + Crossed Polars
Photographer:
Richard W. Hughes •
Image Number:
A-001-1440-3
Gübelin, E.J. (1973) Internal World of Gemstones. Zürich, ABC Verlag, reprinted 1983, 234 pp.; RWHL*.
Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.
After this ruby grew, it was exposed to high pressure, causing certain planes of atoms to glide into a twinned position. This secondary “polysynthetic” twinning takes place along the rhombohedron faces and is common in many corundums. Twin planes cross at 86.1 and 93.9° angles.
Natural Ruby •
Thailand/Cambodia •
Enhancements:
Heat (H) •
Lighting Conditions:
Diffuse Light Field + Crossed Polars
Photographer:
Richard W. Hughes •
Image Number:
A-001-1440-2
Gübelin, E.J. (1973) Internal World of Gemstones. Zürich, ABC Verlag, reprinted 1983, 234 pp.; RWHL*.
Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.
After this ruby grew, it was exposed to high pressure, causing certain planes of atoms to glide into a twinned position. This secondary “polysynthetic” twinning takes place along the rhombohedron faces and is common in many corundums. Twin planes cross at 86.1 and 93.9° angles.
Natural Ruby •
Thailand/Cambodia •
Enhancements:
Heat (H) •
Lighting Conditions:
Diffuse Light Field + Crossed Polars
Photographer:
Richard W. Hughes •
Image Number:
A-001-1440-1
Gübelin, E.J. (1973) Internal World of Gemstones. Zürich, ABC Verlag, reprinted 1983, 234 pp.; RWHL*.
Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.
This small yellowish crystal in a Thai/Cambodian ruby offers proof that the stone has not been subjected to heat treatment. After heating, the crystal would melt into a glass.
Natural Ruby •
Thailand/Cambodia •
Enhancements:
None Detected (None) •
Lighting Conditions:
Fiber Optic: Oblique
Photographer:
E. Billie Hughes •
Image Number:
A-001-1696-2
Gübelin, E.J. (1940) Differences between Burma and Siam rubies. Gems & Gemology, Vol. 3, No. 5, Spring, pp. 69–72; RWHL*.
Gübelin, E.J. (1973) Internal World of Gemstones. Zürich, ABC Verlag, reprinted 1983, 234 pp.; RWHL*.
Gübelin, E.J. and Koivula, J.I. (2005) Photoatlas of Inclusions in Gemstones, Volume 3. Basel, Switzerland, Opinio Publishers, 672 pp.; RWHL*.
This small yellowish crystal in a Thai/Cambodian ruby offers proof that the stone has not been subjected to heat treatment. After heating, the crystal would melt into a glass.
Natural Ruby •
Thailand/Cambodia •
Enhancements:
None Detected (None) •
Lighting Conditions:
Fiber Optic: Oblique
Photographer:
E. Billie Hughes •
Image Number:
A-001-1696-1
Gübelin, E.J. (1940) Differences between Burma and Siam rubies. Gems & Gemology, Vol. 3, No. 5, Spring, pp. 69–72; RWHL*.
Gübelin, E.J. (1973) Internal World of Gemstones. Zürich, ABC Verlag, reprinted 1983, 234 pp.; RWHL*.
Gübelin, E.J. and Koivula, J.I. (2005) Photoatlas of Inclusions in Gemstones, Volume 3. Basel, Switzerland, Opinio Publishers, 672 pp.; RWHL*.
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Thai ruby inclusions may include mineral crystals, 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 Thai origin.
Thai Ruby Inclusion Photomicrographs
The Hyperion Thai ruby gallery includes microscopic features documented in rubies from Thailand and the Thailand–Cambodia border region. Each entry is accompanied by descriptive information and, where available, references to the gemological literature.
What Inclusions Can Reveal About Thai 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 Thai origin.
Hyperion combines inclusion photomicrography with supporting gemological information so that individual features can be compared with documented examples from Thai 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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