Cornflower blue sapphires are among the most coveted gemstones in the world. Their captivating hue, which mirrors the serene beauty of cornflower blossoms, has made them a favorite for jewelry enthusiasts and collectors alike. If you’re in the market for a cornflower blue sapphire, understanding the nuances of these gems can help you make an informed purchase. This guide will walk you through the essential aspects of buying the best cornflower blue sapphires.
What is a Cornflower Blue Sapphire?
Cornflower blue sapphires are renowned for their pure, intense blue color with a slight hint of violet. This particular shade is reminiscent of the cornflower plant, which is where the gem gets its name. Unlike other sapphires, the cornflower blue variety does not have any green or gray overtones, making its color exceptionally pure and vibrant.
The Origin of Cornflower Blue Sapphires
The most famous cornflower blue sapphires originate from the Kashmir region in India. Discovered in the late 19th century, these sapphires were mined for only a few decades, making them incredibly rare and highly valuable. Today, sapphires with cornflower blue hues can also be found in Sri Lanka (Ceylon), Madagascar, and Myanmar (Burma), but Kashmir sapphires remain the gold standard.
Evaluating Cornflower Blue Sapphires
When assessing a cornflower blue sapphire, gemologists consider several critical factors: color, clarity, cut, and carat weight. Understanding these aspects can help you determine the quality and value of the gem.
Color
Color is the most crucial factor in determining the value of a cornflower blue sapphire. The ideal cornflower blue sapphire exhibits a vivid, medium to medium-dark blue with a slight violet undertone. The color should be evenly distributed throughout the gem, without any visible zoning or patches.
Color Saturation: The intensity of the blue is paramount. The best cornflower blue sapphires have a high saturation level, meaning the color is deep and vibrant without being overly dark or dull.
Clarity
Clarity refers to the presence of internal inclusions or blemishes within the sapphire. While some inclusions are acceptable and can even prove the gem’s natural origin, the best cornflower blue sapphires are relatively free of visible inclusions.
Types of Inclusions: Common inclusions in sapphires include silk (fine needle-like inclusions), crystals, and feathers. Ideally, these should not be visible to the naked eye and should not detract from the gem’s overall beauty.
Cut
Cut affects both the aesthetic appeal and the light performance of the sapphire. A well-cut sapphire will have optimal proportions and symmetry, enhancing its brilliance and color.
Cut Quality: The best cuts for cornflower blue sapphires are those that maximize color and minimize wastage of the rough stone. Common cuts include oval, cushion, and round shapes, each offering a unique way to display the gem’s color.
Carat Weight
Carat Weight refers to the size of the sapphire. While larger sapphires are rarer and generally more valuable, the quality of color and clarity should not be compromised. A smaller, higher-quality cornflower blue sapphire can be more desirable than a larger, lower-quality one.
Sourcing Cornflower Blue Sapphires
Understanding the origin of a cornflower blue sapphire can provide insights into its quality and rarity. Here are the primary sources:
Kashmir Sapphires
Kashmir sapphires are considered the pinnacle of cornflower blue sapphires. These sapphires are highly prized for their velvety texture and intense, uniform blue color. However, genuine Kashmir sapphires are extremely rare and often command premium prices.
Sri Lankan (Ceylon) Sapphires
Sri Lankan sapphires, also known as Ceylon sapphires, are renowned for their vibrant blue color and high clarity. They are more readily available than Kashmir sapphires and offer excellent quality at more accessible prices.
Madagascar Sapphires
Madagascar has emerged as a significant source of high-quality cornflower blue sapphires. These sapphires often exhibit excellent color and clarity, making them a popular choice among gem collectors.
Burmese Sapphires
Myanmar (Burma) is another notable source of fine cornflower blue sapphires. Burmese sapphires are known for their rich color and good clarity, often comparable to those from Sri Lanka.
Treatment and Certification
Most sapphires undergo some form of treatment to enhance their color and clarity. Understanding these treatments and obtaining proper certification is crucial when buying a cornflower blue sapphire.
Heat Treatment
Heat Treatment is the most common enhancement for sapphires. This process improves color and clarity, making the gem more visually appealing. Heat-treated sapphires are widely accepted in the market, but untreated sapphires command higher prices due to their natural state.
Certification
Certification from a reputable gemological laboratory ensures the authenticity and quality of the sapphire. Look for certificates from renowned institutions such as the Gemological Institute of America (GIA), the American Gemological Laboratories (AGL), or the Swiss Gemmological Institute (SSEF). These certificates provide detailed information on the sapphire’s color, clarity, cut, carat weight, and any treatments it may have undergone.
Buying Tips
Armed with knowledge about the key factors in evaluating cornflower blue sapphires, here are some practical tips to help you make a confident purchase:
Set a Budget
Cornflower blue sapphires can vary significantly in price. Establish a budget before you start shopping to help narrow down your options and ensure you get the best value for your money.
Choose a Reputable Dealer
Purchase from a reputable jeweler or gem dealer with a proven track record. Look for dealers who provide detailed information about the sapphires they sell and offer certification from respected gemological laboratories.
See Also: What is Peacock Sapphire?
Inspect the Sapphire
Examine the sapphire under different lighting conditions to assess its color and clarity. Natural daylight and incandescent light can reveal different aspects of the gem’s hue and internal features.
Consider the Setting
The setting can significantly impact the appearance of the sapphire. Choose a setting that complements and enhances the gem’s color and brilliance. White gold or platinum settings are popular choices for cornflower blue sapphires, as they provide a neutral backdrop that allows the sapphire’s color to shine.
Ask About Treatments
Inquire about any treatments the sapphire has undergone. While heat treatment is common and accepted, be cautious of sapphires that have undergone more invasive treatments such as diffusion or fracture filling, as these can affect the gem’s durability and value.
Verify the Source
If the sapphire is claimed to be from a specific origin, such as Kashmir or Sri Lanka, ensure this is verified by certification. Origin can significantly impact the gem’s value, so it’s essential to have accurate information.
Conclusion
Cornflower blue sapphires are truly magnificent gems, offering a unique blend of beauty, rarity, and value. By understanding the key factors that determine the quality of these sapphires—color, clarity, cut, and carat weight—you can make an informed decision when purchasing one. Always seek certification from reputable gemological laboratories and buy from trusted dealers to ensure you’re getting a genuine and high-quality sapphire. With these tips in mind, you’re well-equipped to find the perfect cornflower blue sapphire that will be cherished for generations to come.
