Underground carbon dioxide (CO2) storage has gained significant momentum in recent years as nations worldwide strive to achieve their net-zero targets. These targets align with the Intergovernmental Panel for Climate Change's (IPCC) goal of limiting global warming to 1.5–2.0 °C above pre-industrial levels by the turn of the century. The rise in atmospheric carbon dioxide levels has been a major contributor to global warming, forcing urgent action to reduce CO2 concentrations from the current ~ 425 ppm (as of March 2024) back to pre-industrial levels. One promising method for permanent CO2 removal is CO2 mineralization, a process in which CO2 reacts with ultramafic and/or mafic rocks, forming stable carbonate minerals. To simulate and investigate the process of CO2 mineralization under in-situ conditions and the potential of hydrogen production as a byproduct, we present a unique application utilizing fit for purpose testing apparatus and rock samples from Australia, New Zealand, and Oman. We focused on analyzing the thermo-mechanical effects of mineralization on the fracture network, which is initiated and propagated by the continuous stream of CO2 or CO2-rich fluid. Additionally, we aim to identify any self-limiting phenomena that might impede continuous CO2 injection in the field, providing crucial insights for effective CO2 storage and injection strategies worldwide.