BlueRock Diamonds PLC (LON:BRD) has sold 2,400 carats from its Karevleei mine in South Africa at an average price of US$290 per carat for a total of US$700,000. The transaction was conducted privately. “This sale at a time when the traditional sales channels for diamonds remain closed and at a price which we estimate to be at current market value for that particular parcel of diamonds is an excellent result in a highly uncertain market,” said BlueRock executive chairman Mike Houston.

Echo Energy PLC (LON:ECHO) has confirmed an average production of 2,394 barrels oil equivalent per day (boepd) in the first quarter of 2020 whilst detailing an opportunity for low-cost development work. In an update on resources and reserves in Argentina, the company told investors that it has identified an initial portfolio of sixteen low-cost workover and intervention operations within the Santa Cruz Sur asset package. These operations will be focused on taking additional volumes into production which will, in turn, migrate associated volumes into proven developed producing (PDP) reserves.

Vast Resources PLC (LON:VAST) has received its third shipment of equipment for the Baita Plai polymetallic mine in Romania. This includes an underground rock loader and mining jackhammers. The shipment arrived on 1 June and cleared customs on 5 June, and subsequently arrived at Baita Plai over the weekend.

Union Jack Oil PLC (LON:UJO) is expanding its ownership of the Wressle oil field development project, with a deal to acquire an additional 12.5% interest from Humber Oil & Gas Limited for an initial upfront payment of £500,000. It sees the AIM-quoted firm’s stake in the Lincolnshire onshore oil project increase to 40%. Wressle is slated to achieve ‘first oil’ and begin production later this year, and when that project milestone is reached it will be transformational for Union Jack’s production and revenue profile.

Greatland Gold PLC (LON:GGP) shares rose on Monday as the company said it has executed a series of agreements that will assist in the application process for a mining lease at the Havieron project in Western Australia. The AIM-listed firm said its farm-in partner at the project, Newcrest Mining Limited (ASX:NCM), has signed an indigenous land use agreement (ILUA) with the Western Desert Lands Aboriginal Corporation (Jamukurnu-Yapalikunu), the prescribed body corporate for the Martu People of the Central Western Desert region in Western Australia, to establish a framework between the parties in regards to any future development activities at Havieron, including mine construction and operation. The company said there was no change to the beneficial interests in the JV area, which remain 40% for Newcrest and 60% for Greatland.

Arix Bioscience PLC (LON:ARIX) has said its entrepreneur-in-residence, Christian Schetter has been appointed a managing director of the venture capital company. Schetter, who brings with him 20 years’ industry experience, said he hoped to move the company to its “next stage of growth” in his new role. He joined Arix last year and before that was chief executive of Rigontec, an immuno-oncology company he sold Merck.

Crossword Cybersecurity PLC (LON:CCS) said its consulting division has signed a three-year contract with Agria Pet Insurance to become a “trusted cybersecurity partner”. The AIM-listed firm said Agria will use its Virtual Chief Information Security Officer (vCISO) service to improve its cybersecurity posture following the completion of a project to evaluate the insurer’s security controls. The deal is the fifth insurance sector client the Crossword has secured over the last eighteen months and will see Agira receive regular testing of its cybersecurity processes and technology to minimise security risks and ensure continued compliance with regulations.

KR1 PLC (LON:KR1) said it has participated in a token distribution event, or ‘lockdrop’, for Plasm, a decentralised application to be launched on the Polkadot blockchain. The cryptocurrency and blockchain investor said it has time-locked 1,232 Ether, equivalent to around US$253,250, via a smart contract for various durations. In return, it will receive around 66.29mln Plasm tokens. KR1 said the investment was “a novel and innovative way to optimise the utilization of assets in its portfolio”. Plasm is a highly scalable platform that allows developers to build secure applications using its ‘Layer 2’ solution for fast and high capacity transactions.

Kodal Minerals PLC (LON:KOD) said it notes the recent increase in the company’s share price and is not aware of any company-specific reason for this. However, the company notes recent pronouncements about the level of investment in the electric vehicle and battery markets, which are the principal driver of demand for lithium, with Europe attracting EUR60bn of investment in the last year and also the German government’s announcement of an increase in subsidies for purchases of electric vehicles. Kodal also referred shareholders to its announcement on May 28, 2020, which provided an update on the current status of the Bougouni lithium project and its gold exploration assets.

Zaim Credit Systems PLC (LON:ZAIM) has said it is seeing demand for its credit offerings recover as the coronavirus (COVID-19) lockdown in Russia begins to ease off. In its results statement covering full-year 2019, the company said the underlying operations performed better than expected last year, with its loss before tax narrowed to £891,589 from £1.55mln in 2018. The group’s adjusted loss before interest and tax (EBIT) in 2019 was £177,000 versus positive EBIT of £915,000 in 2018. The Russia-focused fintech group said last year saw a significant improvement in its credit scoring system, with the default rate tumbling to 8.1% from 22% in 2018. At the end of 2019, gross outstanding loans to customers amounted to £32.1mln, compared to £29.2mln a year earlier.

Advanced Oncotherapy PLC (LON:AVO) has said its board will be reduced to eight members from 12 following the resignation of four non-executive directors. Stepping down at the company’s annual meeting next month are Gabriel Urwitz, Peter Sjöstrand, Allen Han,  and Dr Yuelong Huang. Thanking them, chairman Dr Mike Sinclair said: “As valued board members, they have helped Advanced Oncotherapy to progress to a leading position as a technology disruptor in proton therapy, and we wish them all the best in their future endeavours.”

Europa Metals Ltd (LON:EUZ) has submitted an application to the Junta of Castilla y León for a new three year investigation permit in respect of the Toral lead, zinc and silver project in north-west Spain. The company was granted an initial investigation permit for Toral in 2017, which is due to expire in November 2020, following conclusion of the customary three year period. An investigation permit provides a company with the right to pursue exploration activities at a project.

NQ Minerals PLC (LON:NQMI) (OTCQB:NQMLF), the Aquis Exchange-listed base and precious metals producer from its Hellyer Gold Mine in Tasmania Australia, announced that it has raised £118,743 gross from an equity issue at 7.5p per share from a UK-based Institutional investor and a group of private investors for general working capital purposes and the company will issue 1,583,241 new ordinary shares.

Strategic Minerals PLC (LON:MLL) said that, further to its announcement of June 4, 2020, the broker option related to its recent placing has been fully subscribed for by existing shareholders of the company. It noted that the broker option raised £100,000 at a price of 0.45p per share through the issue of 22,222,223 new ordinary shares of 0.1p each in the company. The group said this brings the total amount raised by the company under the placing and broker option to £1,200,000 before expenses.

AFC Energy PLC (LON:AFC), a leading provider of hydrogen power generation technologies, announces that, following an exercise of options under the AFC Share Option Scheme, the company has issued 40,000 ordinary shares of 0.1p each at an exercise price of 15.4p per share.

Benchmark Holdings PLC (LON:BMK) said it has been informed that Peter George, the group’s non-executive chairman, purchased 600,000 ordinary shares of 0.1p each in the company at a price of 34p per share on June 5, 2020, and also that Yngve Myhre, another non-executive director, purchased 200,000 ordinary shares at a price of 34.1p per share on the same date. Following these purchases, Benchmark said that George’s total beneficial interest in the company is 3,001,219 ordinary shares, representing approximately 0.45% of its issued share capital; and Myhre’s total beneficial interest in the company is 600,000 ordinary shares, representing approximately 0.09% of the issued share capital.

Metal Tiger PLC (LON:MTR), the AIM-listed investor in natural resource opportunities, has confirmed that its annual general meeting will be held at 10.00am on 30 June 2020 at Higher Shalford Farm, Shalford Lane, Charlton Musgrove, Wincanton, Somerset BA9 8HF. Following the restrictions placed on public gatherings under the Coronavirus Act 2020, shareholders are urged not to attend the meeting in person but to vote by proxy. Further details are given in the notice of meeting.

i3 Energy PLC (LON:I3E), an independent oil and gas company with assets and operations in the UK, has announced that its annual general meeting (AGM) will be held at the company’s London office address being 2 Riding House Street, London, W1W 7FA on 30 June 2020 at 1.00 pm BST.  Under the UK government’s current prohibition on non-essential travel and public gatherings, it will not be possible for all shareholders to attend the AGM in person, and the group therefore strongly encourages shareholders to vote on all resolutions by completing an online proxy appointment form appointing the chairman of the meeting as your proxy, to register any questions in advance and not to attend the meeting in person.

Power Metal Resources PLCX (LON:POW) the AIM-listed metals exploration and development company said the company’s joint broker First Equity Limited has published an initiation research note which can be viewed through the following link: