• WordNet 3.6
    • n felspar any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium
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Webster's Revised Unabridged Dictionary
    • n Felspar (Min) See Feldspar.
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Century Dictionary and Cyclopedia
    • n felspar Same as feldspar.
    • ***
Chambers's Twentieth Century Dictionary
    • Felspar Same as Feldspar.
    • ***


In literature:

In one of the midland counties of Scotland lies the estate of Sir Patrick Felspar.
"Wilson's Tales of the Borders and of Scotland, Volume III" by Various
In such cases the felspar crystals ought to retain the forms of leucite.
"Volcanoes: Past and Present" by Edward Hull
The hornblendites differ from the diorites in containing little felspar, and consist principally of hornblende.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5" by Various
The last-mentioned mineral contains soda instead of the potash found in common felspar.
"Principles of Geology" by Charles Lyell
The mica is mostly black in all the granite boulders that occur here, the felspar most frequently reddish.
"Narrative of a Second Expedition to the Shores of the Polar Sea" by John Franklin
These last consist of an intermixture of nepheline or sodalite and alkali-felspar.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3" by Various
ALASKITE, an igneous rock consisting of quartz and felspar.
"The New Gresham Encyclopedia. Vol. 1 Part 1" by Various
Chiefly composed of glassy felspar, with crystals of glassy felspar.
"A Manual of Elementary Geology" by Charles Lyell
Quartz also is usually present in these rocks, but felspar is rare.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10" by Various
And so on with mica and felspar, and every other mineral.
"Geology" by James Geikie
The felspar-group is divided into two subgroups according to the symmetry of the crystals.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2" by Various
John Felspar, junior partner of the firm of Felspar & Felspar, wine merchants.
"Dramatic Technique" by George Pierce Baker
These plates of mica are separated by bands of pure white felspar.
"In the Arctic Seas" by Francis Leopold McClintock
White mica develops in the felspars.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3" by Various
Felspar if present may be orthoclase and oligoclase.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5" by Various
Felspar, quartz, hornblende, and mica are the four constituents of granite.
"Harper's New Monthly Magazine Vol. IV, No. 19, Dec 1851" by Various
The Serpentine rock streaked with hornblende, felspar, slate and green-stone, shows changing colours like a pigeon's breast.
"Cornwall" by G. E. Mitton
Sometimes the striae on crystal-faces are due to repeated lamellar twinning, as in the plagioclase felspars.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7" by Various
They consist essentially of felspar with hornblende (generally of brown colour) and pale pyroxene.
"Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6" by Various
Among the mineral products are kaolin, felspar and quartz.
"Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 1" by Various