Iron ore is a mineral that is mined from the earth and is used to produce iron. …

Gold ore is a type of rock that contains gold mineral in its natural state. It i…

Copper ore is a naturally occurring mineral resource that contains copper metal …

Calcite is a mineral that is commonly found in sedimentary rocks, such as limest…

Basalt is a dark-colored volcanic rock that is typically formed from the solidif…

Bauxite is a type of rock that is primarily composed of aluminum hydroxide miner…

Limestone is a sedimentary rock composed mostly of calcium carbonate (CaCO3) in …

River stones are smooth, rounded stones that are found in rivers, streams, and o…

Granite is a common type of igneous rock that is composed of minerals such as qu…

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the…

Feldspar is a group of minerals that includes a range of different stones, with …

Sand wash, also known as sand washing, is a method used to clean and remove impu…