Is Oiling Permanent?

Oiling is a common enhancement method used to improve the clarity of rubies by filling surface-reaching fractures with oil or resin. However, one of the most important considerations for buyers is whether oiling is permanent and how it affects the gemstone’s long-term durability and value.

1. The Longevity of Oiling in Rubies

Oiling is not a permanent treatment. Over time, the oil can degrade, evaporate, or be removed by exposure to heat, chemicals, or cleaning agents. This means that the clarity enhancement achieved through oiling may diminish, requiring reapplication to maintain the stone’s improved appearance.

2. Factors That Affect the Durability of Oiling

Several factors can influence how long oiling lasts in a ruby:

• Exposure to Heat: High temperatures can cause the oil to break down or leak out of the fractures.
• Cleaning Methods: Ultrasonic cleaners, steam cleaning, and harsh detergents can strip the oil from the ruby.
• Wear and Tear: Daily wear can gradually cause the oil to wear away, particularly in rings and other frequently worn jewelry.
• Type of Oil Used: Natural oils, such as cedarwood oil, tend to evaporate faster than synthetic fillers or resins, which offer longer-lasting clarity enhancement.

3. Oiling vs. Permanent Clarity Treatments

Unlike heat treatment, which permanently enhances the color and clarity of a ruby, oiling is a temporary enhancement that can fade or be removed. Some modern treatments use resins and polymer fillers, which are more durable than traditional oils but still not entirely permanent.

4. How to Maintain an Oiled Ruby

To prolong the effects of oiling in rubies:

• Avoid exposing the ruby to heat or direct sunlight for long periods.
• Do not use ultrasonic or steam cleaners. Instead, clean with a mild soap solution and a soft cloth.
• Store the ruby separately to prevent scratches or friction that could affect the filled fractures.
• Reapply oil if needed, but consult a professional gemologist for proper treatment.

5. Should You Buy an Oiled Ruby?

Oiled rubies can be a budget-friendly alternative for those looking for visually appealing stones at a lower price. However, buyers should be aware that the treatment is not permanent and requires care to maintain its effects. Always ask for disclosure of any treatments and request certification from a reputable gemological lab to confirm whether a ruby has undergone oiling or other clarity enhancements.

Conclusion

The answer to “Is oiling permanent?” is no—oiling is a temporary treatment that can wear off over time due to heat, cleaning, and daily wear. While it improves a ruby’s clarity, it does not alter its natural structure permanently. Buyers should consider the longevity of the enhancement and the necessary care before purchasing an oiled ruby.

For more details, visit Oiling vs Ruby Treatments to understand how different enhancement methods affect rubies.