NutRound Black Diamond & Diamond Belly Piercing
Order today, delivered by July 15
Crafted in solid 18k gold, the belly piercing Nut is available in three shades: yellow, white, or rose. Its screw system ensures reliable, stable placement. This piece is set with round shape natural black diamonds and diamonds of AAA and G - VS quality. This model is designed specifically for belly button placement.
This model comes in 6 mm, 8 mm, and 10 mm. Check our sizing guide to choose the most suitable length.
Nut | Round Black Diamond & Diamond Belly Piercing
Hypoallergenic 18k White Gold / 3 mm / 6 mm
$690 USD
Message sent!
Thank you for your question. Our team will get back to you by email shortly.
Every MADAJ Piercing comes with a Certificate of Authenticity mentioning all the characteristics.
Each piercing is distinctively engraved with the MADAJ logo and stamped with '750' to guarantee its 18-karat gold composition.
All diamonds above 0.30ct will be delivered with a lab certificate (IGI, HRD or GIA).
Estimated delivery is within 2-3 weeks, as each piece is custom-made to order. Therefore, please note that delivery time may vary by a few days.
- Shipping: Enjoy free worldwide shipping from 200$/200 euros.
- Returns: If your piece isn’t quite right, return it unworn, unaltered and in its original packaging within 30 days for a refund to your original payment method. Refunds are processed within 7-10 days.
Please Note:
- Custom orders, items purchased with discounts (excluding welcome offers), and exchanged items are final sales and cannot be refunded.
- Any returned items that are worn, damaged, or altered will not be accepted.
- Changes to an order make it final.
- Return shipping costs are your responsibility.
- Due to made-to-order production and associated fees, orders of five (5) items or more are final sale.
Over time, jewelry can accumulate body oils and residue from skin products, which may affect the appearance of the mounting and the stones. To maintain the brightness and freshness of your jewelry, follow these simple steps:
- Take a soft-bristled toothbrush with a mild soap and gently brush both the front and back of the stones and metal.
- Rinse the jewelry thoroughly with lukewarm water to remove any soap residue.
- Avoid using ultrasonic cleaners, as they are not recommended for jewelry cleaning depending on the stones.
- Steam cleaning is an effective method, but exercise caution with emeralds or opals, as high heat can potentially damage these stones.
By regularly caring for your jewelry in this manner, you can help preserve its beauty and extend its lifespan.
Choose options
NutRound Black Diamond & Diamond Belly Piercing
Order today, delivered by July 15
COMPLEMENTARY MADAJ SIGNATURE BOX WITH EVERY ORDER
Every creation is carefully handcrafted and delivered in iconic Madaj packaging.
Our Black Diamonds
MADAJ black diamonds are natural in origin, selected for their intense color, polish, and bold presence. To achieve their signature dark finish, these stones undergo a common treatment process — an accepted standard in fine jewelry. Chosen by our expert diamantaires for their quality and ethical sourcing, each black diamond offers a striking, unconventional look. Your stone is certified alongside your jewelry piece, with all key details clearly outlined.
Bold.
Unconventional.
True to our standards.
That’s a MADAJ black diamond.
Only 18k Hypoallergenic Gold
Every MADAJ piece is crafted in solid 18k gold — always nickel-free and hypoallergenic, for maximum comfort and long-term wear.
Available in Yellow, White, and Rose Gold, 18k is the gold standard in fine jewelry — unlike 14k, which carries only 58% gold and often includes irritating base metals.
Enduring quality.
Skin-safe by nature.
Made to stay with you.
Made to Order, Crafted to Fit
Every MADAJ piercing is made just for you — crafted to order in our own atelier, combining traditional goldsmithing with cutting-edge technology. From 3D precision to hand-finishing, our team oversees every step under one roof to ensure exceptional fit, comfort, and quality.
Nothing is mass-produced. We work from raw materials — gold, gemstones, and your specifications — to create a piece that's uniquely yours. That’s how we guarantee a perfect fit, and zero waste.