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79 Images Total

The fact that this hot pink ruby from Mozambique owes some of its beauty to artificial heat treatment is betrayed by the spall marks on a small natural on the pavilion. Like drops of frozen water, they cannot be scraped off with a dental pick, thus demonstrating that they are the result of heat treatment.

Natural Ruby • Mozambique • Enhancements: Heat (H) • Lighting Conditions: Fiber Optic: Overhead
Photographer: E. Billie Hughes • Image Number: A-001-4190-1 • Date Posted: 18 January 2016

Pardieu, V., Saeseaw, S. et al. (2015) "Low temperature" heat treatment of Mozambique ruby: Results report. Gemological Institute of America, 16 April, 34 pp.; RWHL*.

Pardieu, V., Sturman, N. et al. (2010) FAPFH/GFF treated ruby from Mozambique: A preliminary report. Gemological Institute of America, 11 May, 18 pp.; RWHL*.

This mica crystal has a glassy tension fissure surrounding it, providing evidence that the stone was heated.

Natural Ruby • Mozambique • Enhancements: Heat (H) • Lighting Conditions: Fiber Optic: Oblique
Photographer: E. Billie Hughes • Image Number: A-001-3245-1 • Date Posted: 16 November 2015

Pardieu, V., Saeseaw, S. et al. (2015) "Low temperature" heat treatment of Mozambique ruby: Results report. Gemological Institute of America, 16 April, 34 pp.; RWHL*.

Pardieu, V., Sangsawong, S. et al. (2013) Rubies from the Montepuez area (Mozambique). Gemological Institute of America, October 5, 84 pp.; RWHL*.

Thin film inclusions in the basal plane of a Thai/Cambodian ruby.

Natural Ruby • Thailand/Cambodia • Enhancements: Heat (H) • Lighting Conditions: Fiber Optic: Diffuse Oblique
Photographer: E. Billie Hughes • Image Number: A-001-3076-7 • Date Posted: 05 November 2015

Gübelin, E.J. and Koivula, J.I. (2005) Photoatlas of Inclusions in Gemstones, Volume 3. Basel, Switzerland, Opinio Publishers, 672 pp.; RWHL*.

Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.

Thin film inclusions in the basal plane of a Thai/Cambodian ruby.

Natural Ruby • Thailand/Cambodia • Enhancements: Heat (H) • Lighting Conditions: Fiber Optic: Diffuse Oblique
Photographer: E. Billie Hughes • Image Number: A-001-3076-6 • Date Posted: 05 November 2015

Gübelin, E.J. and Koivula, J.I. (2005) Photoatlas of Inclusions in Gemstones, Volume 3. Basel, Switzerland, Opinio Publishers, 672 pp.; RWHL*.

Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.

Thin film inclusions in the basal plane of a Thai/Cambodian ruby.

Natural Ruby • Thailand/Cambodia • Enhancements: Heat (H) • Lighting Conditions: Fiber Optic: Diffuse Oblique
Photographer: E. Billie Hughes • Image Number: A-001-3076-5 • Date Posted: 05 November 2015

Gübelin, E.J. and Koivula, J.I. (2005) Photoatlas of Inclusions in Gemstones, Volume 3. Basel, Switzerland, Opinio Publishers, 672 pp.; RWHL*.

Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.

A melted crystal and surrounding fingerprint form a "Saturn inclusion" in this heated ruby from the Thai/Cambodian border. Thin films are also seen in the background and lie in the plane of the basal pinacoid.

Natural Ruby • Thailand/Cambodia • Enhancements: Heat (H) • Lighting Conditions: Fiber Optic: Diffuse Oblique
Photographer: E. Billie Hughes • Image Number: A-001-3076-4 • Date Posted: 05 November 2015

Gübelin, E.J. and Koivula, J.I. (2005) Photoatlas of Inclusions in Gemstones, Volume 3. Basel, Switzerland, Opinio Publishers, 672 pp.; RWHL*.

Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.

Natural Ruby • Thailand/Cambodia • Enhancements: Heat (H) • Lighting Conditions: Fiber Optic: Diffuse Oblique
Photographer: E. Billie Hughes • Image Number: A-001-3076-2 • Date Posted: 05 November 2015

Gübelin, E.J. and Koivula, J.I. (2005) Photoatlas of Inclusions in Gemstones, Volume 3. Basel, Switzerland, Opinio Publishers, 672 pp.; RWHL*.

Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.

A melted crystal with a frosted surface surrounded by a fingerprint with melted channels. Often known as a "saturn inclusions,” these melted crystals are common in heated Thai ruby.

Natural Ruby • Thailand/Cambodia • Enhancements: Heat (H) • Lighting Conditions: Dark Field + Oblique Fiber Optic
Photographer: E. Billie Hughes • Image Number: A-001-3076-1 • Date Posted: 05 November 2015

Gübelin, E.J. and Koivula, J.I. (2005) Photoatlas of Inclusions in Gemstones, Volume 3. Basel, Switzerland, Opinio Publishers, 672 pp.; RWHL*.

Hughes, R.W. (1997) Ruby & Sapphire. Boulder, CO, RWH Publishing, 512 pp.; RWHL*.

Polysynthetic twinning and fingerprints are both common features in rubies from Tajikistan.

Natural Ruby • Tajikistan • Enhancements: Heat (H) • Lighting Conditions: Diffuse Light Field + Crossed Polars
Photographer: Richard W. Hughes • Image Number: R-001-3276-3 • Date Posted: 18 November 2015

Sorokina, E.S., Litvinenko, A.K. et al. (2015) Rubies and Sapphires from Snezhnoe, Tajikistan. Gems & Gemology, Vol. 51, No. 2, pp. 160–175; RWHL.

Hughes, R.W., Pardieu, V. et al. (2006) Moon over the Pamirs: Chasing ruby and spinel in Tajikistan. LotusGemology.com, RWHL*.

A heat-altered fingerprint lies just below the surface of this Tajikistan ruby.

Natural Ruby • Tajikistan • Enhancements: Heat (H) • Lighting Conditions: Fiber Optic: Oblique
Photographer: Richard W. Hughes • Image Number: R-001-3276-2 • Date Posted: 18 November 2015

Sorokina, E.S., Litvinenko, A.K. et al. (2015) Rubies and Sapphires from Snezhnoe, Tajikistan. Gems & Gemology, Vol. 51, No. 2, pp. 160–175; RWHL.

Hughes, R.W., Pardieu, V. et al. (2006) Moon over the Pamirs: Chasing ruby and spinel in Tajikistan. LotusGemology.com, RWHL*.

A melted crystal betrays the heat-treated origin of this ruby from Tajikistan.

Natural Ruby • Tajikistan • Enhancements: Heat (H) • Lighting Conditions: Diffuse Light Field + Crossed Polars
Photographer: Richard W. Hughes • Image Number: R-001-3276-1 • Date Posted: 18 November 2015

Sorokina, E.S., Litvinenko, A.K. et al. (2015) Rubies and Sapphires from Snezhnoe, Tajikistan. Gems & Gemology, Vol. 51, No. 2, pp. 160–175; RWHL.

Hughes, R.W., Pardieu, V. et al. (2006) Moon over the Pamirs: Chasing ruby and spinel in Tajikistan. LotusGemology.com, RWHL*.

Melted crystals and boehmite needles in a heat-treated ruby from Mozambique.

Natural Ruby • Mozambique • Enhancements: Heat (H) • Lighting Conditions: Fiber Optic: Oblique
Photographer: E. Billie Hughes • Image Number: A-001-2802-3 • Date Posted: 16 October 2015

Pardieu, V., Saeseaw, S. et al. (2015) "Low temperature" heat treatment of Mozambique ruby: Results report. Gemological Institute of America, 16 April, 34 pp.; RWHL*.

79 Images Total

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