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rring in tetragonal crystals, usually of a brown or gray color. It consists of silica and zirconia. A red variety, used as a gem, is called hyacinth. Colorless, pale-yellow or smoky- brown varieties from Ceylon are called jargon. Zircon syenite, a coarse-grained syenite containing zircon crystals and often also elæolit…

A light, similar to the calcium light, produced by incandescent zirconia.

Zirconia.

A salt of zirconic acid.

The oxide of zirconium, obtained as a white powder, and possessing both acid and basic properties. On account of its infusibility, and brilliant luminosity when incandescent, it is used as an ingredient of sticks for the Drummomd light.

Pertaining to, containing, or resembling, zirconium; as, zirconic oxide; zirconic compounds. Zirconic acid, an acid of zirconium analogous to carbonic and silicic acids, known only in its salts.

n-silicon group, intermediate between the metals and nonmetals, obtained from the mineral zircon as a dark sooty powder, or as a gray metallic crystalline substance. Symbol Zr. Atomic weight, 90.4.

See Zirco-.

mmon with tetragonal crystals; -- so called because this form often occurs in crystals of zircon.

Any earthy-looking metallic oxide, as alumina, glucina, zirconia, yttria, and thoria.

of a brownish red color and vitreous luster, consisting chiefly of the silicates of iron, zirconia, and lime.

A red variety of zircon, sometimes used as a gem. See Zircon. Hyacinth bean (Bot.), a climbing leguminous plant (Dolichos Lablab), related to the true bean. It has dark purple flowers and fruit.

A variety of zircon. See Zircon.

A supposed metal alleged to have been discovered in zircon.

A combining form (also used adjectively) designating zirconium as an element of certain double compounds; zircono-; as in zircofluoric acid, sodium zircofluoride.

A double fluoride of zirconium and hydrogen, or some other positive element or radical; as, zircofluoride of sodium.