Crystals grow in different shapes because of the internal symmetry of the crystal and the growth rate along the direction of the crystal. The arrangement of the atoms in a crystal is called a lattice. In a perfect enviro... More »

Geologists classify crystals into six groups based on the number of axes and the angles of the facets, or faces, on a specimen. The science of crystallography labels the six categories as isometric, tetragonal, orthorhom... More »

Some unique crystal paperweights include the Evolution and the Celestial by Waterford Crystal in Ireland, and the Val St. Lambert Bubble Weight, made in Belgium. The Broadfield House Glass Museum in Dudley, England, has ... More »

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There are seven basic crystal shapes: cubic (isometric), tetragonal, orthorhombic, hexagonal, trigonal, triclinic and monoclinic. A crystal's shape is determined by one of seven crystal lattice systems, which are used to... More »

Some interesting ways to use crystals in a science project are to collect and group them, make a model of crystal lattices or the molecular structure of the crystal, grow crystals or prevent crystal growth. Students can ... More »

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Igneous rocks that are allowed to cool more slowly form larger crystals, while igneous rocks that cool quickly form smaller crystals. It is simply a matter of time. The longer it takes for magma to cool, the more time is... More »

Magnetite forms in small quantities interspersed with many iron-rich minerals, but only forms bodies of crystals on its own when mafic magma, a very liquid magma laden with heavy elements, cools sufficiently slowly for i... More »