👉 The term "heliolithic" is a name that refers to a type of mineral, specifically a mineral composed entirely of iron and nickel. The word "heliotrope," which describes how light can be directed towards or away from an object, was used as a metaphor for this type of material in early times. The term "heliolithic" is commonly used in the context of iron-lead ore deposits, where iron and nickel are the primary minerals. These ores are often
