Rocks and Minerals
According to Webster's Dictionary, the definition of a mineral is an inorganic substance. Citrine is one of the most popular minerals. It is a variety of quartz. Citrine is a yellowish-orange mineral. Citrine is a very popular gemstone because it is very affordable and very pretty. Along with topaz, citrine is the birthstone for the month of November and the anniversary gemstone for the 17th year of marriage (www.jewelrymall.com). Citrine is also considered a symbol of hope, youth, health, and fidelity (www.houseofonyx.com). In ancient times, citrine was carried as a protection against snake venom and evil thoughts (www.jewelers.net). Other names for citrine are Imperial Topaz, Oriental Topaz, and Precious Topaz.A chemical formula is what elements make up the mineral (Feather & Snyder, 1999). These elements can be found on the periodic table. The chemical formula of citrine is SiO2, which is silicon and oxygen (www.galleries.com). According to Webster's Dictionary, a silicate mineral is a combination of silicon, oxygen, and one or more minerals. Because citrine is made up of silicon and oxygen, it is a silicate mineral.
Hardness is a measure of how easily a mineral can be scratched. Hardness is usually measured on Mohs hardness scale. The scale is measured from one to ten, with one being the softest and 10 being the hardness (Feather & Snyder, 1999). All kinds of quartz have a hardness of seven. Because citrine is in the quartz family, it has a hardness of seven (www.galleries.com). James Hutton came up with the rock cycle. Hutton is known as the eminent 18th century farmer and founder of modern geoscience (www.science.ubc.ca). Scientists all over the world are still using Hutton's rock cycle today. Molten rock material solidifies at depth or at the earth's surface to form igneous rocks. Rocks that form from minerals precipitating out of water are called chemical sedimentary rocks. The deposits of minerals that remain after evaporation harden, and form chemical sedimentary rocks. An example of a chemical sedimentary rock is limestone. Limestone is found all over the world but the most common form of limestone is found in marine environments. Citrine is mostly used for jewelry but is also found in oscillators and timepieces for radios (www.jewelryblvd.com). Citrine is also used a lot as a substitute for yellow sapphire and yellow diamond. Minerals are found in many kinds of rocks. In this next section, you will learn how minerals make up rocks, and how rocks are formed.
Some common words found in the essay are:
Feather Snyder, Texas Vermont, Webster's Dictionary, Location Limestone, Rocks Rocks, Location Citrine, Marble Marble, Rocks Metamorphic, Sediments Sediments, California Nevada, snyder 1999, feather snyder 1999, feather snyder, sedimentary rocks, metamorphic rocks, igneous rocks, rock cycle, rocks form, earth's surface, sedimentary rock, chemical sedimentary, rocks feather snyder, chemical sedimentary rocks, rock sedimentary rock, rocks metamorphic rocks,
Approximate Word count = 1866
Approximate Pages = 7 (250 words per page double spaced)
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