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Transcript of Gemstones
almost all gem stones start out in the crystalline form. Most
gems are catchy enough that they can be shown the way
they are. Others are mounted onto jewelry and put into
decorations. Organics. The minerals from gems that have
come from living organisms are called organics. For example,
ivory, jet, and shell are not stones and are less durable as
gems with organic minerals. These gems are not faceted like most gems but are polished, carved, or made a cameo. Gems are minerals that have many different properties. Precious metals. Some of the precious metals are gold silver and platinum. These metals are not gems but have their own values. Platinum is the most valued and is the rarest of the three metals. Cut stones. Like this aquamarine gem shown here, almost all gem stones start out in the crystaline form. Most gems are catchy enough that they can be shown the way they are. Others are mounted onto jewelrey and put into decorations. Organics. The minerals from gems that have come from living organisms are called organics. For example, ivory, jet, and shell are not stones and are less durable as gems with organic minerals. These gems are not faceated like most gems but are polished, carved, or made a cameo.
What are gemstones?
Gems are minerals that have many different properties. Precious metals. Some of the precious metals are gold silver and platinum. These metals are not gems but have their own values. Platinum is the most valued and is the rarest of the three metals. Cut stones. Like this aquamarine gem shown here,
How gemstones are formed and where they are found
Optical properties are the elements of a gem that we see. Color. The color of a gem depends mostly on how it takes in light. For example, all chromatic, idiochromatic, multicolor, and pleochroic are examples of the different types of ways light is absorbed to display the different colors. Luster: luster is the word used to describe how light is reflected off of the surface of the gem. Many people think of luster as the shine that a gemstone has to it. The different types of luster are matalic luster, adamantine luster, vitreous luster, waxy luster, greasy luster, silky luster, and dull luster. Interference: interference describes how light is played off of objects that are in a gem. For example, iridescence makes a gem look like it is shimmering with lots of colors. Color, luster, and interference are 3 different types of optical properties that gems have.
Gemstones can be found all around the world. Brazil, Russia, Madagascar, and the former Czechoslovakia are examples of places where gems can be found. Aquamarine gems can be found in Brazil, Madagascar, Russia and Afghanistan. Emeralds can be found in Colombia, Pakistan and Zambia. Diamonds can be found in Botswana, South Africa, Zaire, Russia, Brazil and Australia. Pearls can be found in Australia, Japan and China. Gemstones are either minerals or organics. Mineral gems come from rocks whereas organic gems are made from plants and animals. Metamorphic rocks are formed in the deepest layers of the earth, where there is a significant amount of heat and pressure. Igneous rocks are formed from magma once it cools and solidifies. Sedimentary rocks are made from the layers of earth caused by erosion. Gems that come from plants or animals are called organics. For example, pearls and coral are two of the most common organic gems. Pearl are made by oysters. Corals come from the skeletons of coral polyps. Gems are formed in many different ways, and can be found all over the world depending on the surface of the earth where it was created.
Cutting, polishing, and engraving
Gemstones are very beautiful products of nature. There are a variety of colors, shapes, and sizes. Gems can also be found all over the world. Some can be very valuable. In this presentation you will learn about the different properties that make gemstones unique.
Gemstones have many different elements and properties that make each and every gemstone unique. Next time you pick up a rock and look at it, look closely and see its potential beauty.
A person who is cutting a gemstone is called a lapidarist. Lapidary only refers to a person who is cutting small stones. The four types of gem cutting are tumbling, faceting, carving, and cabochon. Faceting is a form of cutting mostly used in transparent gems, such as diamonds. Faceting is when a gem gets cut and has many faces or flat surfaces. If you can picture a diamond you are probably picturing a faceted diamond. Tumbling is the most common and simplest form of cutting a gemstone. Tumbling is when a gem gets put into a rotating barrel with grit inside. The gem is tossed around until it becomes smooth.
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Digital image. Aquamarine. N.p., n.d. Web. <http://astrologyandfortune.com/images-website/Gemstones/aquamarine%20(1).jpg>.
Digital image. Gemstone. N.p., n.d. Web. <http://images2.fanpop.com/images/photos/7000000/gEmStOnEs-gemstones-7046978-800-707.jpg>.
Digital image. Tourlamine. N.p., n.d. Web. <http://customgemstonestudio.com/wp-content/uploads/2010/05/nwFJiP1010161.jpg>.
Digital image. Gemstone Formation. N.p., n.d. Web. <http://valuablestones.com/rocks.jpg>.
Digital image. Prism. N.p., n.d. Web. <http://planetfacts.org/wp-content/uploads/2011/04/Prism.jpg>.
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Digital image. Gem Pile. N.p., n.d. Web. <http://www.kaviaragems.com/sites/default/files/Gemstones.png>.