Sri Lankan (Ceylon) Gems
Sri Lankan sapphire, padparadscha, spinel, and other gems with characteristics, inclusions, and historical significance.
By Fabian Moor
Last updated
origin/ceylon sri-lanka sapphire padparadscha
Introduction
Sri Lanka (Ceylon) is one of the world's oldest and most prolific gem sources,
producing high-quality stones for over 2,000 years. The island yields sapphires
in all colours, with blue sapphire and the rare padparadscha being most prized.
Sri Lanka remains a major commercial source with consistent quality production.
Blue Sapphire
Ceylon is renowned for blue sapphire:
Characteristics
- Colour: Light to medium blue; high brilliance
- Tone: Generally lighter than Kashmir or Burma
- Clarity: Often excellent transparency
- Sizes: Notable for large crystals
Market Position
- Major commercial source
- Good value compared to Kashmir/Burma
- Consistent quality available
- Large sizes more available than other origins
Ceylon Sapphire Inclusions
| Inclusion | Description |
|---|---|
| Long rutile silk | Distinctive long, slender needles |
| Zircon haloes | Zircon crystals with radiation damage halos |
| Hexagonal colour zoning | Follows crystal growth directions |
| Negative crystals | Well-formed angular voids |
| Fingerprints | Characteristic healed fracture patterns |
| Biotite | Platy dark inclusions |
Long Silk Diagnostic
Padparadscha
Sri Lanka's signature sapphire variety:
Definition
- Name: Sinhalese for "lotus blossom" [3]
- Colour: Pinkish-orange to orange-pink
- Requirement: Both pink AND orange present
- Balance: Neither colour should dominate
Market Value
Origin Significance
- Traditional source is Sri Lanka
- Madagascar, Tanzania also produce similar colours
- Some purists only accept Ceylon padparadscha
- Origin affects value (Ceylon premium)
Padparadscha Controversy
Other Ceylon Gems
Sri Lanka produces many other gem species:
Other Sapphire Colours
Other Species
| Gem | Characteristics |
|---|---|
| Spinel | Various colours; good quality |
| Alexandrite | Historical source; often yellowish |
| Chrysoberyl cat's eye | Fine chatoyant material |
| Zircon | Various colours; heat treatment common |
| Tourmaline | Limited but quality material |
| Garnet | Rhodolite, hessonite |
| Moonstone | Finest adularescence |
Ceylon Moonstone
Heat Treatment
Treatment status in Ceylon sapphires:
- Common: Many Ceylon sapphires are heat-treated
- Unheated available: But command premium
- Light colours: May be heated to intensify
- Geuda: Milky rough transformed by heat to blue [7]
- Disclosure: Should always be stated
References
- ↑ 1. Palke, A.; Saeseaw, S.; Renfro, N.; Sun, Z.; McClure, S. (2019). Geographic Origin Determination of Blue Sapphire. Gems & Gemology, 55(4), 536–579. DOI: 10.5741/gems.55.4.536.
- ↑ 2. Gübelin, E.; Koivula, J. (1986). Photoatlas of Inclusions in Gemstones (1 ed.). ABC Edition. ISBN: 978-3-85504-024-2.
- ↑ 3. Themelis, P. (1992). The Padparadscha Sapphire. Gems & Gemology, 28(3), 162–172. DOI: 10.5741/gems.28.3.162.
- ↑ 4. Laboratory Manual Harmonisation Committee (2010). LMHC Standards and Terminology for the Description of Treatments in Coloured Gemstones. LMHC. https://www.lmhc-gemmology.org.
- ↑ 5. Schumann, W. (2009). Gemstones of the World (4th ed.). Sterling Publishing. ISBN: 978-1-4027-6829-3.
- ↑ 6. Read, P. (2008). Gemmology (3rd ed.). Butterworth-Heinemann. DOI: 10.4324/9780080507224.
- ↑ 7. Emmett, J.; Douthit, T. (1993). Heat Treating the Sapphires of Rock Creek, Montana. Gems & Gemology, 29(4), 250–272. DOI: 10.5741/gems.29.4.250.