Jon Rolfe (born circa 1943–1945, North Easton, Massachusetts) is an American materials scientist, inventor, and pioneering figure in modern lapidary arts. Best known by his moniker "Gearloose", he revolutionized gem faceting and polishing through proprietary tools developed for hobbyists and professionals. His career blends high-level materials engineering — including over 20 patents in biomedical and advanced materials — with a lifelong passion for gem cutting that began in his teens.
Early Life and Education
Details about Rolfe's early years remain private, but he started cutting and polishing stones (both cabs and facets) at age 17, sparking a lifelong fascination with lapidary work. His professional training in materials science equipped him with expertise in alloys, crystal structures, thermoelectric properties, and surface engineering — skills he later applied to gemstone polishing.
Professional Career in Materials Science
Rolfe spent decades as a materials scientist and inventor in industry. Key roles included:
Senior Scientist at Tecomet Inc. (2000–2007), where he focused on biomedical implants and surface texturing technologies.
Earlier positions at companies like Thermo Electron Corporation (now part of Thermo Fisher Scientific) and others in advanced materials.
He holds more than 20 patents (including international filings), primarily in biomedical applications:
- Textured surfaces for orthopedic implants
Porous structures for bone integration
Polyurethane-based drug delivery systems
Nitric oxide generation and inhalation therapies
Wound dressings
Rolfe's faceting hobby exposed frustrations with existing polishing laps (tin-lead alloys that wore quickly, warped, or failed on hard materials like sapphire). Drawing on his metallurgy expertise, he experimented in his home shop.In 1997, he developed the BATT™ lap ( refined to non-toxic alloys), a directionally solidified tin-bismuth alloy with columnar crystal structure that embeds diamond abrasive exceptionally well. Initially for personal use, word spread rapidly in faceting circles, turning his side project into a business almost accidentally.
1997: Gearloose begins informally.
2007: Retires from corporate work to run the business full-time after Tecomet.
2009: Incorporates as Gearloose Lapidary, LLC.
Key innovations: BATT™ (and harder BA5T™ variant), Darkside oxide laps, BATTSTIK™ charging tools, hybrid "Wing" laps, and environmentally safe formulations replacing toxic lead/antimony alloys.
His laps became legendary for durability, flatness, and performance — often called the "Stradivarius of polishing laps." Over 18,000 BATT laps sold, with secondhand ones commanding premium prices. Rolfe contributed technical articles to the International Gem Society (IGS) and co-authored historical pieces on lapidary technology.
Retirement and Later Years
In the mid-2020s (around age 80), Rolfe announced his retirement from Gearloose Lapidary. Longtime friend Sam Baar took over ownership and operations, ensuring continuity (some manufacturing partnerships, like with Ultra Tec, also expanded). Rolfe cited a desire to wind down after decades of innovation.
On a personal level, 2024 brought profound loss with the death of his wife; he has described this chapter as "Life v.3.0 — Doing OK."
A devoted cat lover (once sharing a home with a tuxedo cat that lived to 17.5 years), aviation enthusiast (with experience in planes like the Ted Smith Aerostar), and holder of international affinities (reflected in flags for the US, UK/Wales, Canada, Mexico, and France),
Rolfe maintains an active, witty presence on X as
@JonRolfe8
(joined 2023). His posts blend dry humor, conservative commentary, nostalgia for "back in my day" tools like slide rules, and occasional scientific insights. Jon Rolfe's legacy endures in operating rooms (via biomedical patents) and faceting studios worldwide (via laps that outlast their owners). As one community member put it, he turned materials science into art — making impossible polishes routine and elevating lapidary from craft to precision engineering.