Blue diamonds are made of pure carbon, like all diamonds, but they get their stunning blue color from trace amounts of boron absorbed during formation. This element filters out yellow and red light, leaving that captivating blue hue—and it also makes the diamond electrically conductive. With blue diamonds making up only about 0.5% of all fancy-color diamonds produced, they are incredibly rare and precious. If you're lucky enough to own one, proper care is essential to keep it looking its best. Here’s everything you need to know about everyday maintenance and long-term protection.
Keep Away from Oils and Grease
Like all diamonds, blue diamonds have a natural affinity for grease and oil. They can easily pick up fingerprint smudges, lotions, or cooking oils, and these residues are surprisingly hard to rinse off with water alone. To keep your stone brilliant and clear, avoid wearing your blue diamond jewelry when handling oily foods, applying skincare products, or doing any activity where it might come into contact with greasy surfaces.
How to Clean Your Blue Diamond Safely
- Soak: Mix a mild, neutral cleaner (such as a grease-cutting dish soap) with warm water at a ratio of about 16 parts water to 1 part soap. Soak your diamond for 10–15 minutes.
- Brush: Use a soft-bristled toothbrush to gently scrub the diamond, paying special attention to the back of the setting and any crevices where oil and dirt tend to hide.
- Rinse & Dry: Rinse thoroughly under warm running water, then pat dry with a lint-free cloth. You can also use a professional diamond cleaning solution—just follow the instructions on the bottle.
Pro tip: Have your blue diamond professionally cleaned at least once a year. However, before any professional cleaning, be sure to tell your jeweler about any existing chips or inclusions, because some cleaning methods (like high-heat steam or certain chemicals) can worsen these flaws and weaken the stone. If your piece has small melee diamonds (tiny accent stones), avoid ultrasonic cleaners—the vibrations can loosen them and cause them to fall out.
Store Separately
Diamonds rank 10 on the Mohs hardness scale, which means they can scratch almost anything—including other diamonds. When storing multiple diamond pieces, wrap each one individually in a soft cloth or place them in separate compartments of a jewelry box to prevent friction and abrasion between stones.
Mind When You Wear It
Try to remove your blue diamond jewelry before applying makeup, doing household chores, or swimming. As mentioned, blue diamonds attract oils, and most cosmetics contain oily ingredients that can leave a stubborn film. Harsh chemicals like chlorine bleach or cleaning agents can also discolor or damage the metal setting (especially white gold or platinum prongs), so it's best to keep your ring or pendant away from them.
We also strongly recommend taking your blue diamond piece to a reputable jeweler for an annual check-up. They can inspect the prongs and settings for wear or looseness and tighten or repair anything before it becomes a problem.
Prevent Loss
Build a simple habit: always place your blue diamond ring or jewelry in the same designated spot when you take it off—preferably a drawer or a jewelry box with a soft lining. Never leave it near a sink, bathtub, or open window, where a small knock could send it tumbling down a drain or getting lost.
Consider Insurance
If your blue diamond is particularly valuable or holds deep sentimental meaning, it’s wise to have it appraised annually and update your insurance policy accordingly. Make sure your homeowners' or renters' insurance—or a specialized jewelry policy—covers loss, theft, and accidental damage. That way, you can enjoy wearing your treasure with complete peace of mind.
Caring for a blue diamond doesn't have to be complicated. A little attention to cleaning, storing, and wearing habits will keep its mesmerizing color and sparkle shining for generations.
Want to learn more please refer to our Blue Diamonds Explained guide to understand their color grading, origins, and value factors. And if you're considering one for a special occasion, explore our Blue Diamond Engagement Rings collection to find the perfect piece.
