Indigo Gabbro - Sphere limestone cobbles Australian deposits like Coober Pedy

Australian deposits like Coober Pedy are known for this type of formation

Approximate Weight of 1 Piece: 25g

These agates formed in volcanic environments

where calcium-rich fluids deposited calcite over time

Indigo Gabbro - Sphere limestone cobbles Australian deposits like Coober PedyMined from: Madagascar Description: These Gabbro Alto spheres from Madagascar feature a deep black to charcoal base with scattered gray and silver mineral patches created by interlocking feldspar and pyroxene crystals. When polished into a sphere, the natural grain and mineral contrast become more visible, giving each piece a distinctive mottled pattern. Gabbro is a coarse grained igneous rock that forms slowly beneath the Earths surface as magma