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Update on drilling programme at Kuhmo
Karelian Diamond Resources plc has completed a three-hole, approximately 334-meter winter drilling program at its Anomaly 5 diamond target in Kuhmo, Finland, intersecting rock provisionally interpreted as olivine lamproite breccia in two drillholes. These intersections, occurring at depths between approximately 42.90-46.80 meters and 73.40-81.40 meters, are considered diagnostic of proximity to an olivine lamproite intrusive complex, a rock type associated with diamond-bearing provinces. Further analysis of drill core samples is underway to formally classify the material and assess its diamond-bearing potential, with the discovery of picroilmenite xenocrysts providing strong evidence for a potential source intrusion. Disclaimer*
About this update from Karelian Diamond Resources Plc
Karelian Diamond Resources plc ("Karelian Diamonds" or "the Company") 23 April 2026 INITIAL REVIEW INDICATES POSITIVE RESULTS FROM DRILLING AT ANOMALY 5 Winter drilling programme completed at Anomaly 5 diamond target, Kuhmo, Finland Probable olivine lamproite breccia intersected in two drillholes Diagnostic rock types in drill core indicate proximity to olivine lamproite intrusive complex Karelian Diamond Resources PLC (AIM: KDR), the diamond and natural resources exploration company focused on Finland and Ireland, is pleased to provide an update on its drilling programme at the Anomaly 5 diamond target, located within the Company's Kuhmo project area in eastern Finland. The Company has completed a three-hole drill programme, totalling c.334 metres, at its Anomaly 5 target in Kuhmo. Under an exceptionally thick (35 metres) layer of overburden, two drillholes intersected rock material provisionally interpreted to be olivine lamproite, a rock type associated with diamond-bearing kimberlite provinces globally, including the world-class Argyle and Ellendale diamond mines. The intersections of olivine lamproite were made in drill hole KD-26-02 at a depth of approximately 73.40 - 81.40 metres, within an interval of 8 metres, and drill hole KD-26-03 at a depth of approximately 42.90 - 46.80 metres, within an interval of 3.9 metres. The latter hole started with highly weathered olivine lamproite straight from the bedrock surface. All of the olivine lamproite intersected occurs as breccia and is highly altered. Doctor Hugh O'Brien, kimberlite expert and consultant to the Company, commented: "Identical variegated red brick and blue-green coloured clay-rich breccias were dominant in dike intersections from Joutensuo, roughly 30 km to the North-Northwest along the same or parallel structures in drill core from a previous drilling program now held at the GTK Loppi drill core repository. Additional drilling during that programme adjacent to the breccias, produced coherent olivine lamproite packed with mantle material. Furthermore, our experience with diagnostic rock types at the Company's Seitaperä project, an olivine lamproite blow, which also occur in these Anomaly 5 breccias, including granularized granite (essentially a pseudosandstone formed by the explosive force of gases released during emplac...
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