Sapphires are one of the most sought-after gemstones in the world, known for their stunning hues, exceptional durability, and timeless appeal. Whether you’re considering a sapphire for an engagement ring, heirloom jewelry, or as a collector’s piece, you may have come across the term “natural & untreated” when researching sapphires. But what does this really mean, and why does it matter when choosing a sapphire?
In this article, we will break down the significance of the terms “natural” and “untreated” in the context of sapphires, and why understanding these labels is essential for making an informed purchase.
What Does “Natural” Mean for Sapphires?
The term “natural” refers to sapphires that are formed in the Earth’s crust over millions of years through natural geological processes. These gemstones are not altered or created in a laboratory. They are composed of corundum (aluminum oxide) and obtain their color from trace elements like iron, titanium, and chromium. Natural sapphires are highly valued for their uniqueness, as no two are exactly alike.
When a sapphire is labeled as “natural,” it means it has not undergone any synthetic or artificial processes. Natural sapphires are typically found in countries such as Sri Lanka, Myanmar (Burma), Madagascar, Thailand, and Kashmir, each of which produces sapphires with distinct colors and characteristics.
Key Characteristics of Natural Sapphires:
- Formed over millions of years through natural geological conditions.
- May contain natural inclusions or imperfections, which are often seen as marks of authenticity.
- Vary widely in color, from blue to pink, yellow, and green, based on the minerals present during formation.
What Does “Untreated” Mean for Sapphires?
When a sapphire is labeled as “untreated,” it means the gemstone has not undergone any treatment to alter its color, clarity, or overall appearance. This is an important distinction because many sapphires available in the market have been treated in some way to enhance their visual properties.
Sapphire treatment is a common practice in the gem industry, and it can include various methods, such as heat treatment, clarity enhancement, and surface diffusion. While these treatments can improve a sapphire’s visual appeal, they can also affect the stone’s value. Untreated sapphires, on the other hand, retain their original, natural qualities, making them more rare and valuable.
Common Sapphire Treatments to Know About:
- Heat Treatment: This is the most common treatment for sapphires and involves heating the gemstone to high temperatures to enhance its color and clarity. Heat treatment is generally accepted in the industry and does not significantly affect the stone’s value.
- Clarity Enhancement: This treatment involves using oils or resins to fill in surface cracks and fractures to improve a sapphire’s clarity. Untreated sapphires will have visible inclusions, which are natural and can add to the stone’s uniqueness.
- Surface Diffusion: This treatment involves applying heat and chemicals to a sapphire’s surface to change its color. While it can create beautiful results, this process is not permanent and can be detectable under a microscope.
- Laser Drilling: This involves using a laser to create small holes in a sapphire to remove or reduce inclusions. Like surface diffusion, this treatment is detectable by professionals and can affect the value of the stone.
When a sapphire is labeled as “untreated,” it has not undergone any of these procedures and is considered to be in its purest, most natural form.
Why Does the “Untreated” Label Matter?
- Rarity and Authenticity: Untreated sapphires are rarer and more valuable due to their natural, unmodified state. Natural, untreated sapphires are considered more authentic because they have not been enhanced or altered by humans.
- Value: Untreated sapphires typically carry a higher price tag than treated sapphires. This is because they are more scarce and maintain their original characteristics. For collectors and buyers seeking a gem with integrity, untreated sapphires are often preferred.
- Investment Potential: Because untreated sapphires are rare, they have greater long-term investment potential. If you’re purchasing a sapphire as an investment or heirloom, an untreated sapphire can be more valuable over time as untreated stones tend to appreciate in worth.
How to Identify Natural & Untreated Sapphires
If you’re in the market for a natural and untreated sapphire, it’s important to verify the gemstone’s authenticity. Here are a few steps you can take:
- Request Certification: Reputable jewelers and gem dealers will provide certification from a gemological laboratory, such as the Gemological Institute of America (GIA) or the American Gem Society (AGS), which verifies the gemstone’s natural and untreated status.
- Examine the Stone: Natural sapphires will often show natural inclusions (also known as “fingerprints”) under magnification. These inclusions are tiny imperfections that occur naturally during the formation of the gemstone. Treated sapphires may have fewer visible inclusions due to enhancement processes.
- Work with a Trusted Dealer: When purchasing a sapphire, ensure you are working with a reputable and trusted dealer who specializes in fine gemstones. A professional gemologist will be able to confirm whether the sapphire is natural and untreated.
Conclusion: The Importance of “Natural & Untreated” for Sapphires
Understanding what “natural & untreated sapphires” means for sapphires is essential for any buyer looking for a high-quality, authentic gemstone. A natural sapphire has been formed by natural processes, and an untreated sapphire has not undergone any treatments to alter its color, clarity, or appearance. Untreated sapphires are rare and highly prized for their purity, making them a worthwhile investment for collectors and jewelry lovers.
Whether you’re purchasing a sapphire for an engagement ring, a statement piece, or simply as an investment, knowing the difference between natural, untreated sapphires and treated ones can ensure you make an informed decision.
