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G. onyx is a relatively smaller-sized squid with an average mantle length of about 12 cm (4.7 in), with some warmer water individuals reaching up to 18 cm (7.1 in). ). This species shows sexual dimorphism in mantle size with females maturing faster and growing a couple of centimeters larger than the
Jasper, an aggregate of microgranular quartz and/or cryptocrystalline chalcedony and other mineral phases, [1] [2] is an opaque, [3] impure variety of silica, usually red, yellow, brown or green in color; and rarely blue.
Chalcedony has a waxy luster, and may be semitransparent or translucent. It can assume a wide range of colors, but those most commonly seen are white to gray, grayish-blue or a shade of brown ranging from pale to nearly black. The color of chalcedony sold commercially is often enhanced by dyeing or heating. [4]
Other members of the cryptocrystalline silica family include agate, carnelian, and onyx. Unlike many non-transparent silica minerals, it is the color of chrysoprase, rather than any pattern of markings, that makes it desirable. The word chrysoprase comes from the Greek χρυσός chrysos meaning 'gold' and πράσινον prasinon, meaning ...
An opal doublet consists of a relatively thin layer of precious opal, backed by a layer of dark-colored material, most commonly ironstone, dark or black common opal (potch), onyx, or obsidian. The darker backing emphasizes the play of color and results in a more attractive display than a lighter potch.
Colors often considered "shades of black" include onyx, black olive, charcoal, and jet. These colors may be considered for part of a neutral color scheme, usually in interior design as a part of a background for brighter colors. Black and dark gray colors are powerful accent colors that suggest weight, dignity, formality, and solemnity. [1]
Irving Berlin, who wrote White Christmas, reused some songs from his earlier black-and-white film, Holiday Inn. The title song “White Christmas” and the “Abraham” number are the most ...
[4] [9] Chrome chalcedony (unlike chrysoprase) may also contain tiny black specks of chromite. [3] Chrome chalcedony is (together with agate, carnelian, chrysoprase, heliotrope, onyx and others) a variety of chalcedony. This is a cryptocrystalline form of silica, consisting of fine intergrowths of the minerals quartz and moganite. [1]