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Webster 1913 Edition


Chloropal

Chlo-ro′pal

,
Noun.
[Gr.
χλωρόσ
light green + E.
opal
.]
(Min.)
A massive mineral, greenish in color, and opal-like in appearance. It is essentially a hydrous silicate of iron.

Webster 1828 Edition


Chloropal

CHLOROPAL

,
Noun.
A newly observed mineral, of two varieties, the conchoidal and the earthy; the conchoidal is of a pistachio green color; the other has an earthy fracture, and both varieties are possessed of magnetic properties.

Definition 2024


chloropal

chloropal

English

Noun

chloropal (plural chloropals)

  1. (mineralogy) A massive mineral, greenish in colour and opal-like in appearance, essentially a hydrous silicate of iron.
    • 1877, J. H. Collins, “Remarks on Gramenite from Smallacombe, and on the Chloropal Group of Minerals”, in The Mineralogical Magazine and Journal of the Mineralogical Society, page 70:
      A careful consideration of the various analyses of minerals of the chloropal group given by Dana, leads me, therefore, to propose that the following species and varieties should be regarded as a series of types to which all future discoveries in the group may be referred.
    • 1905, B. K. Emerson, “Plumose diabase and palagonite from the Holyoke trap sheet”, in Bulletin of the Geological Society of America, volume 16, page 105:
      Several delessites and chloropals occurring in basalts have a composition very close to that of the glass.
    • 1969, T. R. Meyers, The Geology of New Hampshire: Minerals and mines, page 18:
      Nontronite, a variety of chloropal occurs as a light yellow powder in druses of the North Conway granite (99, p. 312).