When I was 12 years old I lived in the small African town of Goma Congo on the banks of Lake Kivu. The majestic volcano Mount Nyiragongo, towered in the distance. Occasionally we would walk it's lava flows, feel it's tremors, until eventually even our home was buried beneath a river of its molten rock. Since then, I've had a fiery fascination with lava stone. Born from the earth's core, lava rock is the oldest and most abundant stone in the world, and the only rock known to be formed from…