The Zenith of Nail Artistry :
Real Diamonds, Mastered in Japan.

The 1carat Diamond Nail Certification: Access the Exclusive Japanese Technique. Elevating Nail Professionals to Jewelry Artists.

What is Diamond Nail?

The World’s Most Beautiful Nail Art. The Only One Technology in the World.

Brand Concept

“Diamonds on Nails!?”
A Vision Recognized by the World

The CEO Of Swarovski Headquarters personally visited our company—
the moment 1carat’s technology was recognized by the world.
We are the world’s only certified diamond nail brand.

A New Form of Jewelry

To ensure every client says “beautiful” with complete satisfaction, we use exclusively bridal-quality diamonds.

Round brilliant cuts and heart shapes designed specifically for nails.
Precious stones applied directly onto your fingertips—jewelry you wear on your fingertips every day.

Diamonds You Can Use Forever

Diamonds can be used again and again. We began our development by creating a diamond cleaning system

Eternal brilliance, endlessly reusable. Change designs freely
while building your diamond collection. No metal fixtures—
only pure diamonds on your nails.

LIMITED TIME LAUNCH SPECIAL!

Get 10% OFF
Diamond Nail Technique Course
Use Code: LAUNCH10 at Checkout
Offer ends November 30, 2025

Get Started

Trusted by Master Technicians Worldwide

Since 2003, professional nail artists from Japan to Taiwan have built thriving businesses with 1carat™ Diamond Nail certification. These aren’t just testimonials—they’re proof that mastering this exclusive technique opens doors to premium clients willing to pay $200-400 per service. Our certified master technicians have seen their careers transform, their client bases expand, and their artistic reputation soar. Join them in offering something truly unique: the world’s only certified diamond nail technology.

Miwa Kinoshita

Technical Director, Japan

I’ve been certified with 1carat™ for 14 years, and diamond nails have been a pivotal turning point in my career as a nail artist. The calculated placement of stones to capture light creates an unparalleled beauty, elevating nail art to the level of fine jewelry. This technique goes beyond mere decoration—it’s about designing with light itself. This approach has brought new value to my salon work, and I believe this technology is precisely why my clients have continued to love and trust my services for so many years.

Li Kuei Lien (李貴蓮)

Technical Director, Taiwan

The moment I first encountered 1carat™ Diamond Nails from Tokyo, I was captivated by the unique allure of genuine diamond nail art. The beauty of diamond nails lies in their ability to showcase a woman’s distinctive elegance and confidence—radiant yet refined, never losing that touch of sophistication. Throughout my journey learning this technique, I elevated my professional skills and discovered the profound satisfaction of transforming creative vision into stunning works of art.

Miki Ishimine

General Manager, 1carat™ Headquarters

Taking 1carat™ technology global has always been our vision. After 22 years of success in Japan, we’re now sharing this exclusive certification worldwide. What excites me most is seeing professional nail artists from different cultures embrace our technique and make it their own. This isn’t just about teaching skills—it’s about creating a global community of artists who share our commitment to authenticity, excellence, and the transformative power of real diamonds.

Pricing That Works

START
TODAY

One-time
purchase
No monthly fees
Lifetime access

Flexible Investment

Certification
Complete training
materials
10-week program

GET
CERTIFIED

Automatic
certification
Join 800+
professionals

DIAMOND
ACCESS

Diamond VIP
Exclusive access
Premium gems
Japanese quality

“Master the world’s only diamond nail technique on your schedule.
Join hundreds of successful artists who transformed their careers online.”

Success Rate

Course Investment

ROI Potential

StyleBook Feature Opportunity

1carat Diamond Nail StyleBook Volume 1 and 2

Get Vol.1 on Amazon Get Vol.2 on Amazon

Master License Exclusive Opportunity

Your Work Could Be Featured in Our StyleBook

Published on Amazon — Share Your Artistry with the World

The 1carat™ Diamond Nail StyleBook celebrates exceptional work from our certified Master technicians through a curated collection available on Amazon worldwide.

Master License Benefit:

Only Master License holders working with genuine diamonds are eligible for StyleBook consideration. Your certification opens the door — your artistry earns you the feature.

How to submit your work:

Share your best diamond nail creations on Instagram using #1caratcertified and #1caratdiamondnails.

Our editorial team reviews submissions regularly and selects work that demonstrates:

Technical precision in diamond application
Creative design and innovation
Professional-quality photography
Consistent craftsmanship

What This Means for Your Business:

Featured artists gain global exposure, professional credibility, and a powerful marketing asset. “As featured in 1carat StyleBook” elevates your brand and attracts premium clients.

Join the select group of Master technicians recognized globally. Your lifetime submission rights begin the moment you earn your Master License.

Visit @1carat_certified

Join the Global Elite: 1carat™ Master Certification

✓ No monthly fees
✓ Immediate course access
✓ Professional certification
✓ VIP diamond access (Diamond Kit purchasers)

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The Zenith of Nail Artistry : Real Diamonds, Mastered in Japan.