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zircon
Part of speech: NounOne of the gems; a heavy, hard, sparkling mineral, more or less transparent, found colourless and of various colours- when colourless they are often sold as diamonds, when red they are called hyacinths.
Usage examples "zircon":- Zircon had a possible answer. - "The Wailing Octopus", Harold Leland Goodwin.
- The question arises whether the darkened area surrounding the zircon may not be due to the influence of the radioactive substances contained in the zircon. - "The Birth-Time of the World and Other Scientific Essays", J. (John) Joly.
- The volume of zircon is 65 x 10- 12 c. - "The Birth-Time of the World and Other Scientific Essays", J. (John) Joly.