Botswana Diamonds has reported pre-tax losses of £178, 000 for the six months ended 31 December 2017 compared with £136, 000, a year earlier.
The losses were due to administrative costs as the company continues with its exploration for diamonds in Botswana and South Africa.
Botswana Diamonds raised £500,000 early this year to fund the ongoing exploration activities.
Significant drilling and exploration had taken place on its advanced project at Thorny River in South Africa, it said.
The company was also undertaking a scoping study into its commerciality and drilling was ongoing on the Ontevreden kimberlite to delineate size and diamond content.
In Botswana, exploration was continuing in the Central Kalahari Game Reserve (CKGR) through Sunland Minerals, a joint venture company with Alrosa.