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also spi·nelle  (spĭ-nĕl′)
1. A hard, variously colored mineral with composition MgAl2O4, having usually octahedral crystals, occurring in igneous and metamorphosed carbonate rocks, and valued as a gem. The red variety is sometimes confused with ruby.
2. Any of a group of minerals that are oxides of magnesium, iron, zinc, manganese, or aluminum.

[Italian spinella, diminutive of spina, thorn (from its sharply pointed crystals), from Latin spīna.]


1. (Minerals) any of a group of hard glassy minerals of variable colour consisting of oxides of aluminium, magnesium, chromium, iron, zinc, or manganese and occurring in the form of octahedral crystals: used as gemstones
2. (Minerals) a hard, glassy mineral composed of magnesium-aluminium oxide found in metamorphosed limestones and many basic and ultrabasic igneous rocks. Formula: MgAl2O4
[C16: from French spinelle, from Italian spinella, diminutive of spina a thorn, from Latin; so called from the shape of the crystals]


or spi•nelle

(spɪˈnɛl, ˈspɪn l)

1. any of a group of minerals composed of oxides of metals (magnesium, aluminum, iron, zinc, manganese, etc.).
2. a mineral of this group, magnesium aluminum oxide, MgAl2O4, having octahedral crystals: some varieties are used as gems.
[1520–30; < French spinelle < Italian spinella <spin(a) thorn]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.spinel - a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones
atomic number 12, magnesium, Mg - a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine)
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
ruby spinel, spinel ruby - a spinel used as a gemstone (usually dark red)
Ceylonite, pleonaste - a dark-colored spinel containing iron
References in classic literature ?
He would often spend a whole day settling and resettling in their cases the various stones that be had collected, such as the olive-green chrysoberyl that turns red by lamplight, the cymophane with its wirelike line of silver, the pistachio-coloured peridot, rose-pink and wine-yellow topazes, carbuncles of fiery scarlet with tremulous, four-rayed stars, flame-red cinnamon-stones, orange and violet spinels, and amethysts with their alternate layers of ruby and sapphire.
4 million, showcased by Hong Kong exhibitor Hatta New World Company Limited (Booth: 1-B05); a Sri Lankan chrysoberyl cat's eye stone, that weighs over 100 carats and is valued at more than HK$20 million, from Wilds Company Limited (Booth: 1-B11); a spinel snake presented by German exhibitor Paul Wild (Booth: 1-B01); a cushion vivid pink sapphire from US exhibitor Shaun Gems International (Booth: 1-A16); a purplish-red spinel from Swiss exhibitor ALine GmbH (Booth: 1-C16); and neon mint tourmalines from Ukrainian exhibitor Vitalii Golokoz, Pte (Booth: 1-A27).
3] (Chromia) will react with other metal oxides (metal 'M' may be Ni, Fe or Co) to form spinel (for example Nichromite-Ni[Cr.
While the bridal jewellery was handcrafted with syndicate uncut diamonds, pale pink spinel and baroque Japanese cultured pearls by the Sabyasachi Heritage Jewellery collection.
The material the scientists came up with was magnesium scandium selenide spinel.
The gemstone-inspired color palette of black and white, pink spinel, royal sapphire and gold completes the eye-catching, three-dimension allure of this collection.
After a brief introduction to magnetics and spinel ferrites, he sets out his results using a variety of methods on a variety of materials.
Cobalt ferrite oriented to spinel ferrite category finds considerable usages in different specializations such as gas sensors, microwave absorbers, catalysis, high density magnetic memories and biomedicine [1].
Where the rocks show no or less alteration chromite Spinel gradually replaces the Magnetite.
06, a secondary phase of iron praseodymium oxide (PrFeO3) appears along with the spinel phase.
Other specifications are an octagonal crown set with a faceted synthetic spinel or a faceted sapphire, Roman numerals, polished leaf-shaped second hand, polished sword-shaped hour and minute hands, Sapphire crystal, Black or gray semi-matte alligator skin strap, 18mm double adjustable folding buckle and more.
Kwong Pui Ho (John Ho), Yangon, Myanmar, for assorted Ammolite, chrome tourmaline, hackmanite, thorite and ruby-in-quartz; rough amber, apatite, corundum, gypsum, jadeite, mica, moonstone, pollucite and tourmaline; crystals of spinel and zircon; cabochons of hematite, kyanite, opal and pargasite; and faceted quartz, spinel and tanzanite.