Crystal aggregate (lapis lazuli from Afghanistan)
Construction aggregate (a gravel pit in Germany)
Earth sciences, aggregate has three possible meanings.
mineralogy and petrology, an aggregate is a mass of mineral crystals, mineraloid particles or rock particles.  Examples are  dolomite, which is an aggregate of crystals of the mineral dolomite, and  rock gypsum, an aggregate of crystals of the mineral gypsum.  Lapis lazuli is a type of rock composed of an aggregate of crystals of many minerals including lazurite, pyrite, phlogopite, calcite, potassium feldspar, wollastonite and some sodalite group minerals.
construction industry, an aggregate (often referred to as a construction aggregate) is sand, gravel or crushed rock that has been mined or quarried for use as a building material.
pedology, an aggregate is a mass of soil particles. If the aggregate has formed naturally, it can be called a ped; if formed artificially, it can be called a clod.
Construction aggregate examples
Use in industry
Aggregates are used extensively in the construction industry
 Often in making  concrete, a construction aggregate is used,
with about 6 billion tons of  concrete produced per year.
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Types of Aggregates - Same Day Aggregates, accessdate: March 25, 2017
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