The ore of any precious or semi-precious metal.
gems
precious mineral
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Some examples of substances that can be found in a mine include coal, copper, gold, silver, iron ore, diamonds, uranium, salt, and various types of minerals like quartz, limestone, and gypsum.
Some examples of pure substances used in cooking include sugar, salt, baking soda, and olive oil. These substances are all made up of just one type of molecule and do not contain any impurities.
an icy puddle.
Some examples of soluble substances include sugar, salt, baking soda, vinegar, ammonia, ethanol, hydrogen peroxide, acetone, aspirin, and vitamin C.
Examples of substances hazardous to the environment include pesticides, heavy metals like lead and mercury, oil and petroleum products, and industrial chemicals like PCBs and dioxins. These substances can pollute air, water, and soil, harm wildlife and aquatic ecosystems, and pose risks to human health. Proper handling and disposal of these substances is crucial to minimize their impact on the environment.
Anything that has a component that precipitates. That is assuming you're referring to an inhomogeneous solution. Generally, inhomogeneous refers to something that is not the same throughout. Examples are a mixture of sand and water, oil and water, hexane and water, etc.