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semiprecious stone
sem·i·pre·cious stone S5274300 (sĕm′ē-prĕsh′əs, sĕm′ī-)n. A gem, such as an opal, that has commercial value but was historically not as rare or expensive as a precious stone.semiprecious stone
semiprecious stone: see gemgem,
commonly, a mineral or organic substance, cut and polished and used as an ornament. Gems also are used as seals (items of assurance) and as talismans (good-luck charms). For birthstones, see month.
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