opal

o·pal  (pl)

n.

1. A mineral of hydrated silica.

2. A gemstone made of this mineral, noted for its rich iridescence.

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[Middle English opalus, from Latin, alteration of Greek opallios, probably from Sanskrit upala, from variant of upara-, lower, from upa, below; see upo in Indo-European roots.]

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opal·ine (p-ln, -ln) adj.

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opal [ˈəʊp^əl]

n

(Earth Sciences / Minerals) an amorphous, usually iridescent, mineral that can be of almost any colour, found in igneous rocks and around hot springs. It is used as a gemstone. Composition: hydrated silica. Formula: SiO₂.nH₂O

[from Latin opalus, from Greek opallios, from Sanskrit upala precious stone]

opal-like  adj

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opal  (pl)

A usually transparent mineral consisting of hydrous silica. Opal can occur in almost any color, but it is often pinkish white with a milky or pearly appearance. It typically forms within cracks in igneous rocks, in limestones, and in mineral veins. It also occurs in the silica-rich shells of certain marine organisms. Chemical formula: SiO₂·nH₂O.

Thesaurus

Noun

1.

opal - a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition black opal - a dark colored opal with internal reflections of green or red fire opal, girasol - an opal with flaming orange and yellow and red colors harlequin opal - a reddish opal with small patches of brilliant color opaque gem - a gemstone that is opaque

Translations

opal [ˈəʊpəl] N → ópalo m

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opal [ˈəʊp^əl] n → opale f

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opal

n (= stone) → Opal m; (= colour) → beigegraue Farbe

adj → Opal-, opal-; (colour) → opalen (liter), → beigegrau schimmernd; opal blue → opalblau; opal ring → Opalring m

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opal [ˈəʊp/əl] n → opale m or f

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opal [ˈəʊp/əl] n → opale m or f

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opal

n opal [ˈoupəl]

a type of usually bluish-white or milky white precious stone, with slight traces or streaks of various other colours There are three opals in her brooch; (also adjective ) an opal necklace. opaal حَجَر عَيْن الشَّمْس: حَجَر كريم опал opál(ový) opal; opal- der Opal, Opal-... οπάλι ópalo opaal عقیق opaali (d')opale לֶשֶם दूधिया पत्थर opal opál baiduri, opal ópall opale; di opale オパール 단백석, 오팔 opalas opāls opal, baiduri opaal opal(-) opal opala (de) opal опал opál; opálový opal opal opal โอปอล opal 蛋白石，貓眼石，乳色玻璃 опал دودھيا، ايک پتھر ôpan (khoáng chất) 蛋白石，猫眼石，乳色玻璃