crystal - choose a jigsaw puzzle to solve

A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macroscopic single crystals are usually identifiable by their geometrical shape, consisting of flat faces with specific, characteristic orientations. The scientific study of crystals and crystal formation is known as crystallography. The process of crystal formation via mechanisms of crystal growth is called crystallization or solidification. The word crystal derives from the Ancient Greek word κρύσταλλος (krustallos), meaning both "ice" and "rock crystal", from κρύος (kruos), "icy cold, frost". Examples of large crystals include snowflakes, diamonds, and table salt. Most inorganic solids are not crystals but polycrystals, i.e. many microscopic crystals fused together into a single solid. Examples of polycrystals include most metals, rocks, ceramics, and ice. A third category of solids is amorphous solids, where the atoms have no periodic structure whatsoever.
Colorful puzzle - colorful jigsaw puzzle
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Colorful puzzle

Added year ago by andi


bajeczny bucik - ten bucik to Kopciuszka
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bajeczny bucik

Added over a year ago by basiunia


w słowackich tatrach - spacer,lód,drzewo,niezwykły lód
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w słowackich tatrach

Added over a year ago by wieslawa


kwiaty z minerałów - muzeum minerałów w Świętej Katarzynie
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kwiaty z minerałów

Added over a year ago by elektra


kamienie jubilerskie - jest to zdjęcie kamieni jubilerskich
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kamienie jubilerskie

Added over a year ago by Magdalena Zaręba

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