Where is Star Ruby found?
Corundum (variety: Ruby, asteriated)
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Open the appStar Ruby occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Star Ruby
Myanmar (Burma)
Historically, the Mogok Valley in Myanmar has been the most famous source of high-quality rubies, including Star Rubies, known for their 'pigeon's blood' color.
Sri Lanka
Known for producing a wide range of corundum, including Star Rubies, often with a lighter red or pinkish-red hue.
Thailand
Chanthaburi and Trat provinces are known for their ruby deposits, some of which yield asteriated varieties.
Madagascar
Newer deposits have yielded significant quantities of rubies, including some with asterism.
Tanzania
The Winza and Longido regions are known for ruby production, with some asteriated specimens.
Vietnam
Luc Yen and Quy Chau districts are important sources of rubies, including star varieties.
Collecting tips
- Look for Alluvial Deposits. Many rubies, including star rubies, are found in secondary alluvial deposits. Look for gravel beds in ancient or modern river systems, especially in regions known for corundum.
- Examine Host Rocks. In primary deposits, rubies are found in marble (metamorphosed limestone), gneiss, schist, or basalt. Look for these rock types in known ruby-producing areas.
- Check for Asterism. When examining rough or cabochon-cut material, use a single point of light (like a penlight) to check for the characteristic star effect. The star should be sharp and centered.
- Consult Geological Maps. Utilize geological maps and reports for known corundum occurrences to narrow down potential prospecting areas.
- Safety Precautions. Always obtain proper permits for prospecting. Be aware of local wildlife and environmental conditions. When working in stream beds, be mindful of water levels and currents. No specific chemical hazards are associated with handling Star Ruby itself, but always practice general safety in the field.
Quick Check
- Color:
- Red (various shades)
- Luster:
- Vitreous to adamantine
- Streak:
- White
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