This study explores the mechanical and dynamic properties of a novel aluminum-tourmaline metal matrix composite. While aluminum metal matrix composite materials are prized for their high strength and low weight, they may be dominated by excessive vibrations under dynamic environments, making their fundamental dynamic behavior and damping capacity essential to ensure reliability. To address this, an aluminum-tourmaline metal matrix composite was manufactured via stir casting, considering A356 aluminum alloy and 1% tourmaline by weight, and subjected to T6 heat treatment. The mechanical properties of the developed composite were determined according to DIN EN ISO 6892-1 standard. The dynamic behavior was evaluated through impact hammer testing on a 250 × 250 × 8 mm3 plate to obtain its fundamental frequencies and assess the damping capacity. To validate the fundamental frequencies, a numerical analysis was also conducted in ANSYS Workbench. The findings revealed that the aluminum-tourmaline composite exhibits a 10% higher modulus of elasticity and a 47.50% improvement in damping capacity compared to the matrix A356 aluminum alloy. Moreover, the first ten natural frequencies of the composite material were consistently higher with increments ranging from 9.909 Hz to 129.440 Hz, depending on the vibration mode. The outcomes indicate that tourmaline mineral is an effective reinforcement material that can be considered for aluminum composites for use in challenging applications.