(n.) A nearly pellucid variety of feldspar, showing pearly or opaline reflections from within. It is used as a gem. The best specimens come from Ceylon.
Example Sentences:
(1) In December this year the BBC is doing a three-part adaptation of Wilkie Collins's The Moonstone.
(2) My 10 Victorian novels that are as good as, or better than, anything Dickens wrote: Middlemarch, George Eliot Vanity Fair, William Makepeace Thackeray The Way We Live Now, Anthony Trollope The Mayor of Casterbridge, Thomas Hardy Wuthering Heights, Emily Bronte Jane Eyre, Charlotte Bronte The Moonstone, Wilkie Collins Treasure Island, Robert Louis Stevenson Portrait of a Lady, Henry James North and South, Elizabeth Gaskell • John Sutherland's The Dickens Dictionary (Icon, £9.99) is published tomorrow at 11.15am
(3) One newspaper noted sombrely that Jefferies had also conducted a lesson on the "Victorian murder novel", The Moonstone .
Orthoclase
Definition:
(n.) Common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other. See Feldspar.
Example Sentences:
(1) The authors have found out that fly-ashes included mainly quartz, orthoclase and mullite.
(2) These strains possess better ability to utilize the orthoclase and biotite.
(3) All the ashes have been found to contain: quartz and mullite, 3 ashes contained additionally orthoclase, whereas 1, apart from quartz and mullite, contained kaolinite; naturally radioactive elements (Ra226, K40, Th228) and trace elements (As, Ba, Be, Cd, Ce, Cu, Fe, Pa, Mo, Ni, Pb, Se, U Zu).
(4) In all ash samples alpha-quartz and mullite were found: in some of them also kaolinite and orthoclase were traced.
(5) The following crystalline phases were determined in the materials: kaolinite, illite, quartz, orthoclase and microline.
(6) It was impossible to ascertain whether these synthetic crystals may be sanidine, orthoclase, or microcline.