About Us

Timeless Craftsmanship, Future-Driven Innovation

 The 520Handsome Vision of Modern Luxury

At 520Handsome, we don’t just create premium bags and gemstones — we redefine what luxury truly means.
With over 18 years of expertise in crafting high-end leather goods, we began as a trusted manufacturing partner for some of the world’s most prestigious luxury brands, mastering every process and perfecting every detail. Today, we carry that legacy into our own brand, Kolomomo, while expanding with equal dedication into a field we’ve been cultivating for years: lab-grown gemstones.

From Global OEM to Multi-Domain Brand Innovation

Having produced top-tier handbags and accessories for global luxury labels, we understand that true luxury lies in meticulous attention to detail and an unwavering commitment to quality.

Now through our own brands, JM and Kolomomo, we bring this craftsmanship and design sensibility directly to customers around the world—from Paris to Tokyo, New York to Shanghai—with a steadfast promise of uncompromising quality and trusted production heritage.

Discover Our Lab-Grown Gemstone Collection

The 520Handsome gemstone collection is the result of years of specialized development and technological refinement. With our own in-house gemstone cultivation facility, we’ve assembled a team of leading experts in crystal growth and utilize advanced laser crystal technologies to consistently produce stunning, high-performance stones including:
    •    Paraiba Tourmaline
    •    Ruby and Sapphire
    •    Alexandrite
    •    Cobalt Blue Spinel, among others

Each gemstone matches the physical and chemical properties of its natural counterpart—and often exceeds natural gems in clarity, color stability, and cutting precision.

What sets us apart is our unwavering commitment to sustainability:

✔ Zero mining, zero ecological damage
✔ Fair employment under in-house factory management
✔ Master-level precision cutting by artisans based in Hong Kong
✔ Crystal-growing technology at least five years ahead of industry peers

Why Customers Around the World Trust 520Handsome
    •    Legacy of Luxury Craftsmanship: Once serving world-renowned brands, we now craft directly for you.
    •    Sustainability & Ethics at Our Core: From leather to gemstones, every piece reflects our responsibility to the planet.
    •    Global Standards of Excellence: Rigorous quality control and refined aesthetics earn us long-term trust in Japan, Europe, and beyond.
    •    Emotional and Collectible Value: Our gemstones are more than beautiful—they represent the future of meaningful luxury.

Toward a More Meaningful Luxury

We believe that true modern luxury lies at the intersection of craft, conscience, and innovation.

At 520Handsome, what you own isn’t just a bag or a gemstone — it’s a story of sustainability, responsibility, and timeless artistry.

520Handsome: 18 years of craftsmanship, over a decade of gemstone expertise — bringing warmth, purpose, and innovation to luxury.

Luxury, beyond the surface.