Mango Quartz #3 Colour_Blue Hollandite is an oxide that

Hollandite is an oxide that grows as a rare black star shaped inclusion inside of Clear Quartz crystals

Small specimens of this zinc-copper mineral are beautiful and highly collectable

Discovered in the Hell Creek Formation

This fossilised dinosaur bone comes from a quarry near the Dinosaur National Monument in north-western Colorado

Mango Quartz #3 Colour_Blue Hollandite is an oxide thatThis rare Mango Quartz from Boyaca has incredible tubular inclusions of Hallyosite within. You will receive the exact Mango Quartz crystal pictured. Mango Quartz is a very rare Quartz that can only be found in very small amounts in Boyaca, Colombia. The sometimes fibrous appearing inclusions are rare Halloysite, a clay mineral usually formed in areas with volcanic deposits found in a white yellow colour, the yellow colour coming from the presence of