The Name Behind Bold Spaces
Global INsight. Local Control.
You’ve seen our work — in hotels, towers, and public spaces across the globe — even if you didn’t know it. For decades, Stone Ultra has been the supplier behind the supplier, trusted by those who specify, fabricate, and deliver at scale. We track every slab. We understand what’s at stake.
Where It Begins: Quarries We Trust
The source behind our advantage: trusted quarries with consistent tone, reliable extraction, and scheduling control. We work at the block level — what gets approved is what gets delivered.
Bulgari White Shangrila Mines
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Bulgari blue
Yunnan Group
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Bulgari Green
Dali Mining Group
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From Quarry to Landmark
Yanlord Suzhou Exhibition Hall
A minimalist landmark in Suzhou, designed by Nissin Group using Italian Grey limestone. Stone Ultra ensured consistency of tone and texture, and advised on finishing and sequencing to meet both aesthetic and technical demands.
Explore, Sample, Connect
Material Selection
See available slabs in real-time through our live cam feed.
Live Inventory →
REQUEST SAMPLES
We’ll send a curated selection of stone based on your project.
Request a Sample →
Consult WITH A SPECIALIST
Connect with our on-site team in China or local reps in Europe.
Start Your Spec →
What our partners say
Trusted by those who build, specify and deliver
Sarah Chen
Horizon Properties
Ona Architecture transformed our vision into reality with their innovative sustainable design approach. Their attention to detail and commitment to environmental consciousness resulted in a building that not only looks stunning but also achieved LEED Platinum certification.
Marcus Rodriguez
Metropolitan Council
Working with Ona Architecture on our downtown revitalization project was a game-changer. Their ability to blend modern design with historical preservation created a perfect harmony that has revitalized our city center.
Emily Weber
Tech Innovations
The team at Ona Architecture designed our new headquarters with incredible vision. They created a space that perfectly reflects our company culture while maximizing productivity and employee well-being. The result is simply breathtaking.
Looking for sourcing clarity on your next project?
From stone selection to fabrication advice and scheduling, we help professionals deliver with confidence. Reach out for a quick consultation – no pressure, no assumptions.
120+ Years of Experience
20+ Countries Served
Used on Landmark Builds
Custom Build
Bring your unique vision to life. Our bespoke design process transforms your ideas into a one-of-a-kind home tailored to your lifestyle and preferences.
New Homes
Create your dream home from the ground up. We blend innovative design with functionality to craft beautiful, efficient living spaces that stand the test of time.
Extensions
Expand your horizons without changing address. Our extension designs seamlessly integrate with your existing property, and adding value to your home.