Corundum is one of the most sought-after minerals in the world, known for its stunning colors and incredible hardness, making it a favorite among gem collectors and jewelers alike. Whether you’re looking for sapphire or ruby, both of which are forms of corundum, or simply interested in the raw mineral for its industrial applications, finding a reliable source online is key. This guide will help you navigate where and how to buy corundum online.
Different Types Of Corundum That Are Available.
1. Ruby
- Color: Red
- Details: Ruby is the red variety of corundum, colored by trace amounts of chromium. It is one of the most valuable and sought-after gemstones. Rubies are known for their rich, deep red color, sometimes referred to as “pigeon’s blood,” which is highly prized in the gemstone market.
2. Sapphire
- Color: Blue (Most Common), but also available in yellow, pink, green, purple, and orange.
- Details: Sapphire is the name given to all non-red varieties of corundum. Blue sapphires are the most famous, often associated with royalty and luxury. The colors are primarily caused by trace elements such as iron and titanium. Unique and rare types of sapphires include:
- Padparadscha Sapphire: An orange-pink variety, highly valued and rare.
- Star Sapphire: Exhibits a star-like pattern on its surface due to inclusions within the stone.
3. Colorless Corundum
- Color: Clear/Colorless
- Details: Pure corundum is colorless, and this variety is sometimes used as a diamond substitute. It is less common as a gemstone but is important in industrial applications, especially in making watch crystals and scientific instruments.
4. Pink Sapphire
- Color: Pink
- Details: Pink sapphires are a popular alternative to rubies, offering a lighter, more delicate color. The shade can range from light pink to deep magenta, depending on the concentration of chromium.
5. Yellow Sapphire
- Color: Yellow
- Details: Yellow sapphires are colored by the presence of iron within the crystal structure. They are often used in jewelry and are considered auspicious in some cultures.
6. Green Sapphire
- Color: Green
- Details: Green sapphires are less common and can vary from light to dark green. The green color comes from iron and other trace elements.
7. Purple Sapphire
- Color: Purple
- Details: Sometimes referred to as violet sapphire, this type is colored by a combination of iron and titanium. Purple sapphires are rare and have a unique appeal for jewelry.
8. Orange Sapphire
- Color: Orange
- Details: Orange sapphires, sometimes referred to as “padparadscha-like” when they approach the pinkish-orange hue, are prized for their warm, vibrant color.
9. Star Ruby and Star Sapphire
- Color: Varies (Red for Star Ruby, Blue, Black, or other colors for Star Sapphire)
- Details: These stones exhibit a star-like phenomenon called asterism, caused by needle-like inclusions within the corundum. Star rubies and sapphires are typically cut into cabochons to enhance this effect.
10. Synthetic Corundum
- Color: Varies
- Details: Synthetic corundum is produced in laboratories and can be made in any color. It’s widely used in industrial applications and is also available as synthetic gemstones, which are more affordable than their natural counterparts.
11. Industrial Corundum (Emery)
- Color: Typically brown or black
- Details: Industrial-grade corundum, often called emery, is used for its hardness in abrasives, such as sandpaper, and in cutting tools. This type of corundum is typically opaque and not used in jewelry.
Where to Buy Corundum Online
- Specialized Gemstone Retailers
- Gemstone Websites: Websites like Gem Rock Auctions and GemSelect offer a wide variety of corundum stones, including raw corundum, rubies, and sapphires. These platforms provide detailed descriptions, origin information, and certifications, ensuring the quality and authenticity of the stones.
- Etsy: For those interested in purchasing unique or custom-cut corundum, Etsy is a great platform. Here, individual sellers offer a wide range of corundum minerals, from raw stones to polished gems, often with a personal touch and the ability to request custom orders.
What to Consider When Buying Corundum Online
- Certification and Authenticity Always ensure that the corundum you purchase comes with a certification of authenticity, especially if you are buying it as an investment or for use in high-quality jewelry. Certified gemstones are typically evaluated by recognized gemological institutes, which provide detailed reports on the stone’s characteristics.
- Origin of the Stone The origin of corundum can affect its value. For example, Burmese rubies are highly prized for their deep red color, while sapphires from Kashmir are known for their rich blue hue. Knowing the origin can help you make an informed decision and ensure you are paying a fair price.
- Price Comparison Compare prices across different platforms before making a purchase. While some websites may offer competitive prices, others might include additional benefits such as free certification or custom cutting services.
- Seller Reputation Check the reputation of the seller through reviews and ratings. A reputable seller will have positive feedback, clear return policies, and will provide all necessary information about the stone, including its certification, origin, and any treatments it may have undergone.
Buying corundum online offers a wide range of options, whether you’re looking for gemstones, industrial-grade material, or unique mineral specimens. By choosing reputable platforms like Bonasgold and ensuring the authenticity of your purchase, you can find high-quality corundum that meets your specific needs. Happy hunting!
