Investors are likely to keep an eye on the following small-cap stocks listed on the Australian Securities Exchange.

West Coast Silver (ASX:WCE)

West Coast Silver started diamond drilling at its Elizabeth Hill project in Western Australia to target extensions to the known silver mineralization and investigate structural controls identified through recent geological modelling and fieldwork.

Lunnon Metals (ASX:LM8)

Lunnon Metals found a new gold structure at the Kambalda project in Western Australia during recent reverse circulation drilling aimed at sterilizing the areas surrounding the potential development footprint at the Lady Herial deposit.

Platina Resources (ASX:PGM)

Platina Resources will start air-core drilling programs at its Challa and Beete projects in Western Australia in June to follow up on gold intersections and anomalies from previous drilling.

Pantera Lithium (ASX:PFE)

Pantera Lithium welcomed the Arkansas Oil and Gas Commission's approval of a 2.5% mineral owner minimum lithium royalty structure for brine-based lithium projects in the Smackover Formation.

Rumble Resources (ASX:RTR)

Rumble Resources said MEGA Resources revised the preliminary open pit mine plan after receiving a geotechnical report on the Western Queen South deposit in Western Australia following a review of their previous plan.