agate

(redirected from Agata)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Agata: Agatha

agate

(ăg`ĭt), translucent, cryptocrystalline variety of quartzquartz,
one of the commonest of all rock-forming minerals and one of the most important constituents of the earth's crust. Chemically, it is silicon dioxide, SiO2.
..... Click the link for more information.
 and a subvariety of chalcedonychalcedony
[from Chalcedon], form of quartz the crystals of which are so minute that its crystalline structure cannot be seen except with the aid of a microscope. Chalcedony has a waxy luster and is translucent to transparent.
..... Click the link for more information.
. Agates are identical in chemical structure to jasper, flint, chert, petrified wood, and tiger's-eye, and are often found in association with opal. The colorful, banded rocks are used as a semiprecious gemstone and in the manufacture of grinding equipment. An agate's banding forms as silica from solution is slowly deposited into cavities and veins in older rock. The stones can be artificially stained to produce combinations of color more vivid than those found in the natural state. The cutting and staining of agates has long been centered at Idar-Oberstein, Germany. Important sources of agate are Brazil, Uruguay, and the United States (Oregon, Washington, and around Lake Superior). The moss agate or mocha stone contains visible impurities in the form of dendritic shapes that resemble moss. See onyxonyx
, variety of cryptocrystalline quartz, differing from agate only in that the bands of which it is composed are parallel and regular. Its appearance is most striking when the bands are of sharply contrasting colors; black and white specimens are often used for cameos.
..... Click the link for more information.
.

Agate

 

a mineral; a variety of chalcedony in the form of a dense, cryptocrystalline aggregate of fibrous or radial quartz formations (Si02)—so-called quartzite or α-tridymite. The mineral is characterized by multiple interstratification of thin (up to 10 microns), variously colored layers. The hardness of agate on the mineralogical scale is 6.0–6.5. The following varieties are recognized depending on the combination of colors in the layers—onyx (white and black layers), carnelian (red and white), sardonyx (reddish brown and white), and agates (bluish gray and white). Agate occurs in veins, in geodes, in amygdules among igneous rocks, and in the tuffs of the last. It is used as an industrial or semiprecious stone and in the manufacture of technical articles (bearing stones, prisms for scales, and so on). Agate is colored artificially to obtain bright, decorative forms.

G. P. BARSANOV

agate

[′ag·ət]
(graphic arts)
A type size in printing of about 5½ points, where 72 points equals 1 inch.
(mineralogy)
SiO2 A fine-grained, fibrous variety of chalcedony with color banding or irregular clouding.

agate

symbolizes health; supposed to relieve snake and scorpion bites. [Class. and Medieval Legend: Leach, 27]
See: Health

agate

confers this power. [Rom. Folklore: Brewer Dictionary,15]

agate

1. an impure microcrystalline form of quartz consisting of a variegated, usually banded chalcedony, used as a gemstone and in making pestles and mortars, burnishers, and polishers. Formula: SiO2
2. a playing marble of this quartz or resembling it
References in periodicals archive ?
There was an effect of planting time and cultivar for S at 15 DAE, with Agata presenting a higher, BRS F63 Camila a lower, and BRS Clara an intermediate content (Figure 1g).
Although the clip pen is Detectamet's most popular design, Agata needed a stick pen for her specific requirements.
Fully escorted by a friendly, experienced tour manager Flying direct from Cardiff Departs 2 June & 29 September 2015 Featuring half-board accommodation in Sant' Agata, this wonderful holiday includes escorted visits to Pompeii, Mount Vesuvius and the enchanting Isle of Capri, and a breath taking drive along the Amalfi Coast.
TVI Pacific reported that the Agata nickel project in northern Mindanao, the Philippines, has initiated shipments of high-iron/low-nickel direct shipping ore (DSO).
On the verge of taking vows in the community of nuns that raised her as an orphan, 18-year-old postulant Anna (Agata Trzebuchowska) is suddenly ordered by Mother Superior to leave the convent and visit an unknown aunt.
Aunt Wanda (stage actress Agata Kulesza) regards the demure Anna (neophyte Agata Trzebuchowska) with a sort of caustic curiosity even as she bluntly delivers the information that the girl's birth name is Ida Lebenstein and that her mother (Wanda's sister) and father were murdered during the war.
Flying direct from Manchester Departs 10, 17 May, 7, 21 June, 5 July, 6, 20, 27 September & 11 October 2014 Join us in one of the Mediterranean's most spectacular corners, where a choice of accommodation in Sorrento or neighbouring Sant' Agata, and well-priced optional excursions, make this an ever-popular holiday choice.
Choose between worldfamous Sorrento or its overlooking neighbour, Sant' Agata, and enjoy well-priced optional excursions, including Pompeii's haunting ruins, enchanting Capri and the scenic Amalfi Coast.
Based in three-star half-board accommodation in exquisite Sant' Agata, this hugely popular holiday includes escorted visits to Pompeii and the enchanting Isle of Capri, and a breath-taking drive along the Amalfi Coast.
| KUWAIT, June 10 (KUNA) -- Deputy Prime Minister, Foreign Minister and Minister of State for Cabinet Affairs Sheikh Sabah Al-Khalid Al-Sabah received a letter on Sunday from the Minister of Foreign Affairs of Italy, Terzi di Sant' Agata tackling bilateral relations between the two countries and ways of developing them.