De Beers: The Customer Who Carried the Rival’s Future Prices

De Beers industrial-diamond price fixing involved an admitted agreement to raise worldwide list prices for products used in industrial tools. In its July 13, 2004 announcement, the Justice Department reported that De Beers Centenary AG pleaded guilty, while General Electric had been tried and acquitted on the same charge. For someone in pricing or sales, the revealing part is how future prices traveled between suppliers: through an officer of a customer who was actually acting for De Beers.

This antitrust case concerned the inputs for saw blades, machining tools and drill bits. The industrial-diamond products and the route their confidential prices took are the story here, separate from the gem-diamond business familiar to jewelry buyers.

Industrial Diamonds Went Into Tools

The criminal indictment identified three product groups affected by the alleged list-price agreement: saw diamond, compacts tooling and drilling products. Tool manufacturers used them in cutting and polishing tools for work ranging from road construction and stone cutting to automobile manufacturing, mining and oil drilling.

The indictment described different routes to those buyers. De Beers sold almost all its industrial-diamond products through distributors, while GE sold most of its products directly to tool manufacturers. That distinction matters to an insider following a price instruction: the supplier’s internal plan, the distributor’s price list and the customer’s offer can sit with different people. Knowing the grade, product and sales channel helps connect them.

A Customer Executive Carried Future Prices

According to the Justice Department’s account of its guilty plea, De Beers admitted reaching agreements to raise list prices for certain industrial-diamond products sold worldwide. Officers, employees and agents acting for De Beers communicated with a rival supplier, attended meetings and transmitted detailed future pricing information and plans. The plea account also described using the cover of a customer officer to carry that information between the suppliers.

The indictment supplied the commercial relationships behind that cover. Diamant Boart was a diamond-tool manufacturer buying industrial-diamond products from both GE and De Beers. Its chief executive also held a directorship at Sibeka, the company participating in De Beers’ industrial-diamond manufacturing joint venture. The indictment alleged that information passed through this executive under the pretext that it served Diamant Boart alone, while actually serving the manufacturing interests of Sibeka and De Beers.

We see a customer relationship being used to help suppliers raise prices together. The customer was the messenger. The job title explained the access. The alleged purpose of the exchange explained the scheme.

Draft Lists Showed What Customers Had Not Seen

The indictment charged a worldwide list-price agreement during 1991 and 1992 and described exchanges of unfinished price plans before customers or distributors received them. It described drafts, corrections and instructions about secrecy, giving a pricing insider something much more concrete than a graph of rising prices.

Confidential Drafts Went Out Before Public Announcements

The indictment alleged that a GE European managing director sent the customer-company executive preliminary saw-diamond pricing plans in November 1991. Those plans had not been finalized or circulated among GE management. After receiving a final internal memorandum directing that the information remain strictly confidential, the managing director allegedly sent a complete future price list and corrections to the earlier material.

The alleged exchange then moved in the other direction. In December, the customer-company executive supplied De Beers’ future prices and planned announcement and implementation dates, including prices for its Syndite compacts tooling and Syndrill drilling products. The indictment quoted an internal GE memorandum saying that the executive supported an increase and wanted to know whether GE would follow. The question concerned the rival’s planned response before buyers received the new prices.

For a sales analyst, the draft and the final customer circular answer different questions. The circular shows what the business eventually offered. An earlier transmission can show who had the information while the decision was still being made, and an accompanying message can explain why it was shared.

A Missing Grade Came Back as a Handwritten Revision

The indictment alleged that GE initially omitted its medium-grade saw diamond, MBS-70, from a planned increase. The European managing director then requested its inclusion because De Beers planned to raise the price of its comparable product. GE allegedly added the grade to the increase.

The next document was a revised future price list, changed by hand to include that product. According to the indictment, the managing director obtained it before the rest of GE’s sales force and met privately with the customer-company executive that evening. For someone who knows the product range, a handwritten addition can identify the precise pricing decision that a rival’s plan allegedly changed.

The Effective Date Mattered Too

The indictment also alleged that GE decided to delay the effective date of increases for compacts tooling and drilling products. Its European managing director objected that the delay would jeopardize GE’s “entire price increase including saw diamond.” GE allegedly reversed the delay, and the managing director told the customer-company executive that it would not occur.

The same indictment described De Beers’ distributors issuing new lists to customers. In an analogous business, an employee may recognize both parts: a private instruction about timing and the customer-facing list that implements it. We would examine the communications alongside the effective dates and products to understand how the decision reached the buyer.

What an Insider Adds to the Price History

An insider can connect a rival’s future price information to the instruction that changed a product, date or quote. That is the useful evidence behind the price pattern. A pricing analyst might know which version was internal, who received it early and which customer offers later used it. A distributor’s employee might recognize a change that arrived before the announced increase.

A 2018 review in the Proceedings of the Creative Construction Conference explains why employee knowledge matters alongside statistical detection methods. The paper, Review of Collusion and Bid Rigging Detection Methods in the Construction Industry, singles out insider reports:

Applied to industrial-diamond pricing, that means understanding the conversation behind the revision. A person who handled the price list may be able to explain the product shorthand, the distribution restrictions and why an otherwise ordinary customer received unfinished plans. We work with that knowledge to connect the exchange to the decisions inside the business.

The criminal case against AU Optronics supplies a parallel in another industrial input. The Justice Department’s account of the LCD-panel case described meetings in Taiwan to coordinate panel prices, and a jury convicted the company and its U.S. subsidiary. Both cases put the private exchange between suppliers at the center of the pricing story. An employee’s knowledge of that exchange can explain what the eventual customer offer conceals.

Bringing a Similar Exchange to Us Today

For someone seeing a similar exchange today, we assess the potential whistleblower case around the information, the affected purchases and the person who knows what happened. The antitrust whistleblower rewards program operates under a Justice Department and Postal Service agreement bearing May 7, 2025 signatures. Whether a case fits that program is a judgment we make with you.

If similar coordination reaches government purchases, we also examine the bids, invoices and payment requests for knowingly false claims for government money. A whistleblower case under the False Claims Act can pay 15% to 30% of what the government recovers. We build that assessment around the actual transactions and your knowledge of the pricing decision.

You Know Who Saw the Price First

If you handled a rival’s future prices or saw a customer carry instructions between suppliers, talk with our whistleblower experts about that exchange. We build your strongest case with you, bring in antitrust whistleblower lawyers who understand industrial pricing and distribution, and stay beside you throughout the case.