a Small production included under " Miscellaneous gems."
b For value oj production in this year, see p. 165.
c
Includes apatite, calamine, chlorastrolite, croeidolite, datolite,
fossil coral, Iceland spar, kyanite, lapis lazuli, obsidian, peridot,
phenacite, rutile, smithsonite, spodumene (kunzite), staurolite,
thom-sonite, titanite, and zircon.
d Includes
chlorastrolite, datolite, epidote, fossil coral, hematite, Iceland
spar, kyanite, lazulite, obsidian, rhodonite., rutile, sepiolite,
serpentine, spodumene, staurolite, and vesuvianite.
e
Includes andalusite, chlorastrolite, datolite, epidote, feldspar,
fossil coral, hematite, Iceland spar, lapis lazuli, obsidian, peridot,
phenacite, pyrite, rhodonite, rutile, sepiolite, smithsonite,
spodumene, staurolite, thomsonite, willemite, and zoisite.
/
Includes andalusite, calamine, chlorastrolite, datolite, epidote,
feldspar, fluorite, Iceland spar, lapis lazuli, mariposite, meerschaum,
obsidian, phenacite, pyrite, satin spar (gypsum), staurolite,
thomsonite, willemite, and zoisite.
9 Includes
chlorastrolite, datolite, feldspar, fossil coral, hematite, jet, lapis
lazuli, meerschaum, spinel, spodumene (kunzite), thomsonite, and
Iceland spar.
The
value given in the table represents as nearly as possible the value of
the rough material; the value of the cut and polished gems is several
times greater. The completeness and accuracy of the statistics of
production depend on the assistance rendered by the gem miners and
dealers, and their help is greatly appreciated.
