StoneFyr is a veteran-owned design and engineering studio based in the United States. We specialize in precision 3D-printed products, particularly storage and display systems for graded coin collectors.
We started StoneFyr because collectors deserve better than generic plastic bins and repurposed containers. Graded coin slabs are standardized. Storage should be too. So we designed products that fit: precisely, securely, and repeatably.
Every product in our catalog was designed from scratch in our workshop. We don't resell other people's designs. We don't outsource manufacturing. We run our own printers, select our own materials, and inspect every unit before it ships.
We print in a range of engineering-grade thermoplastics: PLA, PETG, PCTG, ABS, and ASA. Each material has its own strengths, from everyday stiffness to heat resistance, UV stability, and chemical durability. We match the material to each product's requirements rather than forcing one filament to do every job.
Our current product lines:
Modular storage cases for NGC, PCGS, CAC, and ANACS graded coin slabs. Stackable, with sliding lids and precision-fit interiors. Available in 5, 10, 15, and 20-slab sizes.
Display and organization trays for graded slabs and 2x2 coin holders. Grid-based layouts in multiple sizes for clean, organized presentation.
We also take on custom 3D printing projects: prototypes, replacement parts, enclosures, jigs, and one-off builds.
Co-Founder · U.S. Army Veteran
Runs the business side of StoneFyr: product design, engineering, manufacturing, process, and the technical infrastructure behind everything. Brings the same discipline and attention to detail from military service to every product that ships.
Co-Founder · U.S. Army Veteran
Focused on operations and customer experience. Handles the people side of StoneFyr, making sure every customer interaction is solid and every order gets the attention it deserves. Two veterans, one mission: make things that work and stand behind everything we sell.
StoneFyr is founded and operated by two U.S. Army veterans. That background shows up in how we run the business: attention to detail, follow-through on commitments, and no cutting corners on quality.
We don't use our veteran status as a marketing gimmick. We mention it because it's true, because it matters to some of our customers, and because it reflects how we approach the work.