gema

Definitions of gema
  1. noun
    a precious or semiprecious stone incorporated into a piece of jewelry
    synonyms: alhaja, joya, piedra preciosa
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    types:
    solitario
    a gem (usually a diamond) in a setting by itself
    esmeralda
    a transparent piece of emerald that has been cut and polished and is valued as a precious gem
    type of:
    joyas, joyería
    an adornment (as a bracelet or ring or necklace) made of precious metals and set with gems (or imitation gems)
  2. noun
    a crystalline rock that can be cut and polished for jewelry
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    types:
    show 17 types...
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    cabuchón, cabujón
    a highly polished gem that is cut convexly but without facets
    granate, piropo
    any of a group of hard glassy minerals (silicates of various metals) used as gemstones and as an abrasive
    ópalo
    a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones
    amatista, ametista
    a transparent purple variety of quartz; used as a gemstone
    calcedonia
    a milky or greyish translucent to transparent quartz
    crisólito
    a brown or yellow-green olivine found in igneous and metamorphic rocks and used as a gemstone
    coral
    the hard stony skeleton of a Mediterranean coral that has a delicate red or pink color and is used for jewelry
    diamante
    very hard native crystalline carbon valued as a gem
    esmeralda
    a green transparent form of beryl; highly valued as a gemstone
    jade
    a semiprecious gemstone that takes a high polish; is usually green but sometimes whitish; consists of jadeite or nephrite
    jaspe
    an opaque form of quartz; red or yellow or brown or dark green in color; used for ornamentation or as a gemstone
    lapislázuli
    an azure blue semiprecious stone
    rubí
    a transparent deep red variety of corundum; used as a gemstone and in lasers
    zafiro
    a precious transparent stone of rich blue corundum valued as a gemstone
    topacio
    a mineral (fluosilicate of aluminum) that occurs in crystals of various colors and is used as a gemstone
    turmalina
    a mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium; it is usually black but occurs in transparent colored forms that are used as gemstones
    turquesa
    a blue to grey green mineral consisting of copper aluminum phosphate
    type of:
    cristal
    a solid formed by the solidification of a chemical and having a highly regular atomic structure
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