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In the field of mineralogy, fracture is the texture and shape of a rock's surface formed when a mineral is fractured.Minerals often have a highly distinctive fracture, making it a principal feature used in their identification.
Halite (or salt) has cubic cleavage, and therefore, when halite crystals are broken, they will form more cubes. Rhombohedral cleavage occurs when there are three cleavage planes intersecting at angles that are not 90 degrees. Calcite has rhombohedral cleavage. Octahedral cleavage occurs when there are four cleavage planes in a crystal.
The mineral olivine (/ ˈ ɒ l. ɪ ˌ v iː n /) is a magnesium iron silicate with the chemical formula (Mg,Fe) 2 Si O 4.It is a type of nesosilicate or orthosilicate.The primary component of the Earth's upper mantle, [9] it is a common mineral in Earth's subsurface, but weathers quickly on the surface.
Clavicle fractures occur at 30–64 cases per 100,000 a year and are responsible for 2.6–5.0% of all fractures. [15] This type of fracture occurs more often in males. [ 15 ] About half of all clavicle fractures occur in children under the age of seven and is the most common pediatric fracture.
Peridot olivine is the birthstone for the month of August. [17] Peridot has often been mistaken for emerald beryl and other green gems. [18] Noted gemologist G.F. Kunz discussed the confusion between beryl and peridot in many church treasures, most notably the "Three Magi treasure" in the Dom of Cologne, Germany. [19] [1]
Serpentine minerals are often formed by the hydration of olivine-rich ultramafic rocks at relatively low temperatures (0 to ~600 °C). [15] The chemical reaction turns olivine into serpentine minerals. They may also have their origins in metamorphic alterations of peridotite and pyroxene.
An open fracture, also called a compound fracture, is a type of bone fracture (broken bone) that has an open wound in the skin near the fractured bone. The skin wound is usually caused by the bone breaking through the surface of the skin.
Enstatite is a mineral; the magnesium endmember of the pyroxene silicate mineral series enstatite (MgSiO 3) – ferrosilite (FeSiO 3).The magnesium rich members of the solid solution series are common rock-forming minerals found in igneous and metamorphic rocks.