Red ball of clay is equivalent to a red mineral. A blue ball of clay is equivalent to a blue mineral. No matter which way you "cut" the ball of clay, it will be that pure color. If you put a little of the blue and red minerals together, you have created a rock. Minerals make up rocks. If you take a friend home, will your mom know you from your friend? What is the difference between you and your friend?
The difference can be called "characteristics. By far one of the most astonishing purchases available for gypsum I saw one day on the internet, was a gypsum hanging light fixture. The price of this gypsum lighting was over one thousand USD. I would likely not make such an expensive purchase, but very beautiful it was.
Selenite is a big favorite for kids. Often called a selenite wand, these beautiful forms of gypsum are commonly purchased for children. In that, there are a few important things to note to help you take care of selenite or any form of gypsum for that matter. Selenite should not be in the sun for long periods of time. Prolonged sunlight will cause brittleness, loss of color, and loss of its silky sheen. Selenite should not be kept in the sun longer than 1 or 2 hours.
Selenite can get wet, however you should dry it off to prevent damage. If immersed in water for too long, selenite will be irreparably damaged. It is always best to keep water away from selenite and other forms of gypsum. Remember, selenite is brittle and not very strong. Chances are if you buy this for a younger child, they will almost break it immediately! If you buy selenite for your kids, keep this in mind. Luckily this mineral is fairly inexpensive. Gypsum vs Quartz.
At times gypsum can be confused with quartz. Gypsum and quartz can look very similar. Quartz is much harder of a mineral and has a very different chemical formula. The crystal system of gypsum and quartz is very different. Some very distinguishing types quartz crystals that are far from the appearance of gypsum are amethyst and citrine. Gypsum vs Calcite. If you have a sample if each, try to scratch one sample with the other to observe the difference in the hardness.
You also can test the hardness of these two minerals using a pocketknife. The blade of the knife has a hardness value between calcite and quartz. The knife can scratch a calcite crystal but will not scratch quartz. Quartz and calcite crystals have distinctively different crystal shapes.
One of the most common forms of calcite is a rhombohedron, though it also can form prismatic crystals, scalenohedrons and other less common forms and combinations.
The most common form of quartz is a hexagonal prism that is terminated with six-sided pyramids at either end of the crystal. Many quartz crystals may not exhibit the perfect crystal shape or may appear to have a three-sided pyramid at the terminus.
Still other minerals are used in industry, such as chromite, a chromium ore, which is used to harden metals. Finally, minerals are very useful in everyday objects such as watches quartz and plaster gypsum. A mineral is "a naturally occurring, inorganic element or compound with a definite chemical composition, a characteristic crystalline structure, and distinct chemical properties. The "lead" in pencils is really graphite. Mica is composed of silicon, oxygen, iron, and aluminum. It forms very thin crystals that flake off into sheets.
Mica is used as glitter in some make up. Pyrite is an iron sulfide that has a metallic luster shiny like metal and brassy color. Key characteristics, are unchanging properties of a substance.
They can thus be reliably used to identify that substance. Minerals have key characteristics. These include:.
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