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Llanite is a porphyritic rhyolite with distinctive phenocrysts of blue quartz (a rare quartz color) and perthitic feldspar (light grayish-orangeish). The brown, fine-grained groundmass consists of very small quartz, feldspar, and biotite mica crystals.
Magenta is variously defined as a purplish-red, reddish-purple, or a mauvish–crimson color. On color wheels of the RGB and CMY color models, it is located midway between red and blue, opposite green. Complements of magenta are evoked by light having a spectrum dominated by energy with a wavelength of roughly 500–530 nm.
Inclusions of the mineral dumortierite within quartz pieces often result in silky-appearing splotches with a blue hue. Shades of purple or gray sometimes also are present. "Dumortierite quartz" (sometimes called "blue quartz") will sometimes feature contrasting light and dark color zones across the material. [43] [44] "Blue quartz" is a minor ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Varieties of the color violet Violet Spectral coordinates Wavelength 380–450 nm Frequency 800–715 THz Color coordinates Hex triplet #8000FF sRGB B (r, g, b) (128, 0, 255) HSV (h, s, v) (270°, 100%, 100%) CIELCh uv (L, C, h) (41, 134, 275°) Source W3C B: Normalized to [0–255 ...
By removing much light that is not blue, blue and purple objects show a broader range of colors. Used for medical applications that involve making dyes fluoresce 47B deep blue tricolor: Used for color separation. It is also commonly used to calibrate video monitors while using SMPTE color bars. [13] 50 deep blue: LG or L Wratten number Visible ...
Aventurine is used for a number of applications, including landscape stone, building stone, aquaria, monuments, and jewelry. Aventurine is a form of quartzite , characterised by its translucency and the presence of platy mineral inclusions that give it a shimmering or glistening effect termed aventurescence .
The first recorded use of the word lavender as a color term in English was in 1705. [5]Originally, the name lavender only applied to flowers. By 1930, the book A Dictionary of Color [6] identified three major shades of lavender—[floral] lavender, lavender gray, and lavender blue, and in addition a fourth shade of lavender called old lavender (a darker lavender gray) (all four of these shades ...
De Saussure believed that the color of the sky was dependent on the amount of particles suspended in the atmosphere, [a] [2] and that these particles had an opaque color blue (thought to be 34 degrees on the scale). [1] If this were true, then one could estimate the concentration of such particles using the cyanometer. [1]