CASSITERITE

Cassiterite (SnO₂) is a high-density tin oxide mineral, known for its glossy black to brown crystals and brilliant luster. With a Mohs hardness of 6–7, it's a durable gem often found in pegmatites and alluvial deposits. Treasured by collectors for its weight and shine, cassiterite is also seen spiritually as a grounding stone—believed to promote willpower, inner strength, and focus. A powerful piece of Earth's resilience, perfect for serious collectors and energy workers alike.