GEMM's Diamond Milling Plant to Open in September 1998.

RENO, Nev.--(BUSINESS WIRE)--July 13, 1998--Juina Mining Corp. (OTC BB:GEMM) Monday announced that a team from the company's consultants, MPH Consulting Limited of Toronto, Canada, has completed their inspection of the site selected for GEMM's milling plant.

They also finalized the equipment list and flowsheet for the operation, which is scheduled to commence in September 1998. W.J. Anderson of MPH Consulting indicated that the team included the senior diamond consultant from its African office, and that the consultants were impressed with the property logistics and the suitability of the terrain for mining.

The flowsheet proposed for the property is designed to ensure proper security and mechanical efficiency, and is flexible enough to handle any expected feeds at varying throughputs up to 100 tons of gravel per hour. GEMM already has in hand and stored in Juina some of the milling equipment for developing the property.

"We expect to take delivery of special customized equipment in the next five or six weeks, which will complete the milling plant system," said Noel M. Frenzel, president of GEMM.

Once gravel is fed to the plant the process is designed to separate and concentrate heavy minerals and diamonds in successive stages. The front end of the plant employs various screens, which serve to size the feed material to make it easier to concentrate and to discard waste. In order to reduce the volume of the feed and streamline the concentration stage, magnetic separator units are used to eliminate much of the iron-rich minerals.

The products of the concentration stage are finally passed through a special device called a Sortex machine, which can selectively separate diamonds based upon their physical characteristics under x-rays. All the important concentration steps for diamonds in the plant are in high-security enclosures.

Juina Mining is a diamond resource and exploration company with exclusive rights to a mining and mineral concession on 1,000 hectares (2,471 acres) located in Juina, Mato Grosso, Brazil. Visit the company's Web site at www.gemmdiamonds.com.

Except for the historical information contained herein with regard to the plan for commencing plant operations, the matters discussed in this news release contain forward-looking statements, as defined in Section 27(A) of the Securities Act of 1933 and Section 21(E) of the Securities Exchange Act of 1934, as amended. Such forward-looking statements and information involve risks and uncertainties, including but not limited to, late delivery of vendor supplies, equipment or services that may cause production delays, primary customer order rates, cancellations, and dependence on certain customers of the company's specialized business products. Other uncertainties related to the company's business and securities which are traded over the counter, are outlined in the information and materials available upon request. For more information, contact the Investor Relations Division of Kit Bromley & Co. Inc., 310/689-1026.

    CONTACT:  Kit Bromley & Co. Inc.
               Investor Relations Division, 310/689-1026