# H. Tracy Hall's Diamond Presses

**Type:** work
**Status:** Draft
**Confidence:** High
**Focus:** materials science, synthetic diamond, high-pressure apparatus, superhard materials, company formation
**Era:** first diamond synthesis 1954 (at GE); Utah press work 1955-1970s
**Location:** Brigham Young University and Provo, UT
**Updated:** 2026-06-19
**Relates:** cites [National Inventors Hall of Fame — H. Tracy Hall](nihf-h-tracy-hall.md)
**Relates:** cites [Chemical & Engineering News — First Diamond Synthesis, 50 Years Later](cen-first-diamond-synthesis.md)
**Relates:** cites [BYU Special Collections — H. Tracy Hall Biography](byu-archives-h-tracy-hall.md)
**Pull:** *After making the first reproducible synthetic diamond, an Ogden-born chemist came home and reinvented the machines that make extreme pressure.*

## Summary

H. Tracy Hall was an Ogden-born physical chemist with B.S., M.S., and Ph.D. degrees from the University of Utah. At General Electric in Schenectady, New York, as part of a team known as Project Superpressure, Hall produced the first reproducible synthetic diamond on December 16, 1954, using a high-pressure, high-temperature machine of his own design called the "Belt." GE announced the achievement in February 1955.

Hall left GE in 1955 and returned to Utah as a professor of chemistry and director of research at Brigham Young University. There he invented new high-pressure machines — the tetrahedral press (four anvils) and the cubic press (six anvils) — that became important successors to the Belt. He went on to invent an early form of polycrystalline diamond and co-founded the Provo-area companies MegaDiamond (1966) and, later, Novatek. This page is honest about credit: the first synthesis happened at GE, not Utah; the Utah story is the apparatus innovation and industrial follow-through that came after.

## Impact

Synthetic diamond reshaped cutting, grinding, polishing, drilling, and heat management across manufacturing. The original GE breakthrough did not happen in Utah, so this page does not claim it. The Utah-era contribution is the machinery: Hall's tetrahedral and cubic press designs advanced how researchers and manufacturers reach and sustain extreme pressure and temperature reliably and economically.

The cubic press, in particular, had outsized industrial reach. Hall transferred cubic-press technology abroad around 1960, and the design family became the workhorse of large-scale synthetic-diamond-powder production — much of the world's industrial diamond powder is now made on cubic presses descended from his designs.

## What Was Created

The hard problem in diamond synthesis is not only chemistry; it is equipment. Turning graphite into diamond requires very high pressure, high temperature, a metal catalyst, precise containment, and — crucially — repeatability, in a machine that does not destroy itself or contaminate the sample. Small changes in anvil geometry, stress distribution, heating, and sample assembly separate a useful run from a failure.

Hall's response was to change the geometry of how pressure is delivered. The tetrahedral press converged four anvils on a small volume; the cubic press used six. Both were attempts to make high-pressure work more flexible, productive, and reproducible than the original Belt. At BYU he also produced an early form of polycrystalline diamond (PCD), a material important to cutting and drilling tools.

## Why It Mattered

The Utah work mattered because it kept Hall — and a cluster of people and companies around him — at the center of high-pressure research after the GE breakthrough. BYU became a real site for diamond-press experimentation and high-pressure apparatus development, and the Provo area gained companies that commercialized industrial diamond and high-pressure equipment.

The deeper point is that materials breakthroughs are often won by whoever can build the machine. Hall's career is a clean example of treating apparatus design as the frontier, and it established Utah as a small but genuine node in superhard materials and high-pressure science.

## Utah Context

Hall's Utah connection is direct and durable: a University of Utah Ph.D. who built his post-GE research program and his companies in Provo. BYU's high-pressure work and the MegaDiamond / Novatek lineage gave the Wasatch Front a foothold in superhard materials and industrial diamond manufacturing that persisted for decades. For students and operators drawn to materials, mechanical design, and hard-tech manufacturing, it is one of Utah's clearest examples of academic research feeding a local industrial ecosystem.

## People and Institutions

- **H. Tracy Hall** — synthetic-diamond pioneer; University of Utah Ph.D.; BYU professor and director of research; inventor of the tetrahedral and cubic presses.
- **Francis Bundy, Herbert Strong, Robert Wentorf** — GE Project Superpressure colleagues; part of the contested credit story around the first synthesis.
- **M. Duane Horton and Bill J. Pope** — BYU colleagues associated with the company effort that became MegaDiamond.
- **MegaDiamond / Novatek ecosystem** — Provo-area companies tied to industrial diamond and high-pressure technology.

## Lessons for Builders

- The instrument is the invention. In high-pressure materials work, the press is the breakthrough; building better apparatus beat chasing better chemistry alone.
- Reproducibility creates industries. The Belt and cubic presses mattered because they made diamond synthesis repeatable, not just possible once.
- Bring it home and commercialize. Hall turned academic apparatus work into Utah companies; the research-to-industry path is a recurring Utah pattern.
- Be honest about shared credit. Hall's GE-era recognition is historically charged; a durable account separates what can be cleanly attributed from what is disputed.

## Evidence

- [National Inventors Hall of Fame: H. Tracy Hall](https://www.invent.org/inductees/h-tracy-hall) — [source record](nihf-h-tracy-hall.md)
- [Chemical & Engineering News: First Diamond Synthesis, 50 Years Later — a Murky Picture of Who Deserves Credit](https://cen.acs.org/articles/82/i5/First-Diamond-Synthesis-50-Years.html) — [source record](cen-first-diamond-synthesis.md)
- [BYU Special Collections: H. Tracy Hall biography](https://archives.lib.byu.edu/agents/people/2364) — [source record](byu-archives-h-tracy-hall.md)
- [Wikipedia: H. Tracy Hall](https://en.wikipedia.org/wiki/H_Tracy_Hall)
- [H. Tracy Hall Foundation](https://www.htracyhall.org/)

## Open Questions

- Accounts of Hall's role and recognition at GE are historically charged; this page should keep distinguishing clean attribution (the Belt design, the Dec. 16, 1954 run) from contested credit.
- A future `ventures/megadiamond.md` page would be a natural cross-link target; it does not yet exist.
- Confirm the exact founding date and corporate history of MegaDiamond and Novatek against primary sources before stating them precisely.