Gray is among the colors most often found in nature. Gray has a wide variety of uses in nature from camouflage to ornamentation. Gray is not appropriate for all areas because some objects are too bright and contrast with it. Gray can be used to highlight beautiful scenes or buildings or as a background. Gray is often used for interior decorative applications or as a border on photos.
Gray is an intermediary hue between white and black. It's a monochromatic or chromatic color, which means literally that it's a basic color, "with no contrast" because it can easily be made up of pure black and white (cyanine). It's the third most widely occurring mineral in the Earth's crust after gold and silver. Gray is also the fifteenth most frequently discovered mineral in the Earth's crust. Gray is most commonly found in combination with white and black or white and gray, making up an important part of the scientific vocabulary for color mixing.
The name "grey" comes from the Greek word Georgia, meaning "dark grey". Because of its similarity to the human eye's pupil, the term is typically used to describe night vision gear. Some sunglasses, especially those designed for darker faces, are made in this shade so that light can pass through without reducing the contrast. The chemical element chromium is responsible for the conversion of the mineral into this dark grey colour.
The best known use of this dark grey colour is in sunglasses, due to its high reflectivity. Sunglasses use this type of coating because the UV (ultraviolet) light coming from the sun isn't absorbed by the lenses and becomes reflected, or refracted, by the water in the lens. This means that, while wearing sunglasses in tropical waters, you'll see the white belly of the fish clearly, yet it will be surrounded by the highly reflective metallic coat which prevents sunlight from reaching the eyes. In addition to being highly reflective, this coating is extremely wear-resistant, which makes it suitable for many underwater uses. This is also why eyewear designers often use this colour in contact lenses, since they are water-resistant too.
In fact, this very metal is a very useful material for many different grey applications. Unlike gold, silver, or platinum, the colour of dark grey is not sensitive to tarnishing, scratching, or other damage caused by water or moisture. This means that this metal can serve as a good base for antique jewellery, especially if the gold is embedded in the design. The dark grey can also be painted or coated with other substances, in order to create a variety of different colours.
Another fascinating property of this mineral is that its base colouration can change with the light. Gray comes in a wide range of blue and green hues, so even when the light is yellowish, it will often still be a shade of grey or light blue. One reason this is the case is that the base colour of the mineral is often made up of smaller crystal sized elements, which are then illuminated under a variety of differing conditions. For example, in metamorphic rock, the crystals in the rock are illuminated under high levels of energy, resulting in the development of colour that's commonly seen as being either blue or green in nature.
In fact, this very chemical element is responsible for the development of several different types of colour in nature. The scientific name for this mineral is Beryl, and this crystal element is often found in rock salts. Beryl is commonly used as an additive to paint and is used in contact lenses and other forms of eye wear. Other examples include the purple colour of many stones and rocks, as well as the blue colour of marine algae. Because beryl has a variety of properties which allow it to be used for so many different things, the mineral is a very important chemical element in our lives.
Gray is a silvery colour when it's formed in nature, but because it is so unique it's also commonly found in a range of other forms as well. Some of these forms of grey occur naturally and tend to be rather soft, but they are also common elements in metamorphic rock. This means that there are two separate ways that the chemical element can appear. When it's found in the rocks it can either be grey or purple. However, in addition to this, there are some situations where the mineral can appear in a more regular form, such as when it's formed as part of an existing metal.