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Business Details
14 Years
experience
Custom & Expandable Jewelry in New York, NY
Ostasz Studio is a New York City-based atelier dedicated to crafting exceptional fine jewelry through innovative engineering and meticulous artistry. Founded on principles of quality and craftsmanship, we specialize in patented expandable ring technology that solves traditional fit challenges while maintaining aesthetic integrity. Our team combines decades of experience in luxury goods engineering with a passion for creating personalized pieces that reflect clients' lifestyles. Every item is handcrafted in our NYC workshop using ethically sourced diamonds and precious metals, ensuring both comfort and durability.

We welcome custom requests, collaborating closely with clients to transform unique visions into wearable art. Our patented design guarantees a minimum two-size adjustability without compromising structural integrity, backed by in-house repair services completed within three weeks. With a heritage rooted in precision engineering and artistic excellence, we serve discerning clients seeking both innovation and timeless elegance in their jewelry.
Services
Custom Jewelry Design Expandable Ring Creation Diamond Sourcing Jewelry Repair Platinum Work Gemstone Setting Wedding Band Creation Cufflink Manufacturing Necklace Crafting Watch Repair
Details
  • Year established: 2012
Highlights and features
  • We offer over 20 years of experience in fine jewelry engineering
  • Patented unbreakable expandable ring design with 2+ size adjustability
  • Handcrafted in New York City with ethically sourced diamonds
  • Custom requests welcomed with expert collaboration
  • 3-week delivery guarantee for standard orders
Services
Custom Jewelry Design
Our custom jewelry service transforms personal visions into unique wearable art through collaborative design. Clients work directly with master craftsmen to select materials, shapes, and settings that reflect their individual style. Each piece combines technical precision with artistic flair, ensuring perfect fit and lasting beauty while maintaining our patented expandability features.
Expandable Ring Creation
Our patented expandable rings solve traditional fit issues through innovative engineering. Using US Patent No. 11,064,776 B2 technology, rings maintain structural integrity while offering at least two full size adjustments. This breakthrough design ensures comfort without compromising aesthetic quality or durability.
Diamond Sourcing
We specialize in ethically sourced natural diamonds selected for superior cut, color, and clarity. Our experts meticulously screen stones to ensure quality standards, offering both classic white diamonds and rare fancy color specimens for inclusion in custom and standard collections.
Jewelry Repair
Our in-house repair service handles all adjustments and maintenance for jewelry purchased through Ostasz Studio. Utilizing original manufacturing techniques, our NYC-based artisans complete most repairs within three weeks, ensuring pieces retain their original quality and patented functionality.
Platinum Work
We specialize in platinum fabrication for its durability and timeless appeal. Our craftsmen create intricate settings and structural elements that showcase diamonds and colored gems while maintaining the metal's natural white luster through precise hand-finishing techniques.
People
Marek Ostasz
Founder & Master Craftsman
With over 25 years in fine jewelry engineering, Marek brings precision and artistry to every creation. His technical expertise and passion for innovation drive our patented expandable ring technology, blending traditional craftsmanship with modern solutions.
Dmitriy Klimov
Creative Director
Dmitriy combines visionary design with practical functionality, leading our custom jewelry projects. His background in luxury goods design ensures each piece balances aesthetic beauty with wearable comfort, reflecting clients' unique stories and preferences.
Questions
What makes Ostasz Jewelry's expandable rings unique?
Our patented design (US 11,064,776 B2) allows rings to expand at least two full sizes while maintaining structural integrity through innovative engineering that prevents breakage.
Can I request custom jewelry designs?
Yes, we specialize in custom creations. Our process involves collaborating with clients to develop unique pieces that incorporate personal elements while maintaining technical excellence.
How long does delivery take for standard orders?
Most standard orders ship within three weeks of purchase, with custom pieces requiring additional time based on complexity.
What materials do you use in your jewelry?
We work primarily with platinum, 18K/20K gold, and ethically sourced diamonds. Our collection includes both classic white diamonds and rare fancy color specimens.
Do you offer repair services for purchased jewelry?
Yes, we provide in-house repair services for all Ostasz Jewelry pieces, with most repairs completed within three weeks by our original manufacturing team.
Are your diamonds ethically sourced?
All diamonds are ethically sourced and carefully screened for quality. We maintain strict standards for cut, color, and clarity across our collections.