ROCKS AND MINERALS SETS: Variety

ROCKS AND MINERALS SETS: Variety

•  A variety of rocks & minerals sets for use in the science laboratory including: Geological Specimens  |  Scale of Hardness Test  |  Igneous  |  Metamorphic  |  Sedimentary.
•  Comparing Rocks and Minerals:
1- A ROCK is a naturally occurring solid aggregate of one or more minerals or mineraloids –
a term used to describe a number of different hypotheses which suggests that petroleum and natural gas are formed by inorganic means rather than by the decomposition of organisms.
2- A MINERAL is a naturally occurring substance that is solid and stable at room temperature and can be represented by a chemical formula, usually abiogenic, and has an ordered atomic structure.

(Wikipedia excerpt: .."...In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition, and the way in which it is formed. Rocks form the Earth's outer solid layer, the crust, and most of its interior, except for the liquid outer core and pockets of magma in the asthenosphere. The study of rocks involves multiple subdisciplines of geology, including petrology and mineralogy. It may be limited to rocks found on Earth, or it may include planetary geology that studies the rocks of other celestial objects. . .")

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