About Newfield

Newfield Resources is a growing and dynamic diamond exploration and development company listed on the Australian Securities Exchange.

About us

Newfield and the Tongo Mine Development

Newfield Resources (ASX: NWF) is a resource company with a diamond mine under construction in Sierra Leone and highly prospective exploration licences in Liberia.

The Company’s flagship asset is the highly endowed Tongo Diamond Mine located in eastern Sierra Leone. Following the completion of a Front End Engineering and Design (FEED) study in 2019, the Company has progressed the mine development through 2020 with completion of significant surface and underground infrastructure

Underground development is focused on accessing kimberlite stopes to commence commercial production. This work has already achieved the intersection and first kimberlite ore from the Kundu ore reserve, and the processing and recovery of the first underground production diamonds from the Tongo Mine in December 2020.


Since Newfield took control of the Tongo Project in April 2018, key milestones include:


Declaration of 8.3 million carats diamond resource
of which 1.1 million carats has been declared as a probable reserve


First production diamonds
yielded in December 2020


Completion of Front End Engineering and Design (FEED) study,
which was the basis of the financial and technical decision to commence mine construction


Significant surface and underground infrastructure
construction completed


Processing plant designs completed and partly procured,
and a small 5 tph plant commissioned for early development phase production


Expert team recruited,
including highly experienced underground diamond mining professionals