• Webster's Revised Unabridged Dictionary
    • n Basanite (Min) Lydian stone, or black jasper, a variety of siliceous or flinty slate, of a grayish or bluish black color. It is employed to test the purity of gold, the amount of alloy being indicated by the color left on the stone when rubbed by the metal.
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Century Dictionary and Cyclopedia
    • n basanite A silicious rock or jasper, of a velvety-black color, used as a touchstone for determining the amount of alloy in gold. The touchstone was formerly extensively used, but is now much less common. See touchstone and touch-needle.
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Chambers's Twentieth Century Dictionary
    • n Basanite bas′an-īt a kind of quartz serviceable for testing the purity of the precious metals by the marks made.
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Webster's Revised Unabridged Dictionary
L. basanites, lapis, Gr. ba`sanos the touchstone: cf. F. basanite,
Chambers's Twentieth Century Dictionary
Gr. basanos, touchstone.


In literature:

The flows from Kibo include nepheline and leucite basanite lavas rich in soda felspars.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3" by Various
Similarly there are leucite-basalts and leucite-basanites.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3" by Various