A mineral consisting predominantly of zirconium silicate (Zr2SiO4) occurring 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.
an imitation gemstone made of cubic zirconia.
a mineral that is a common accessory phase in all types of igneous rocks.
a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent
One of the most important gemstones. It occurs naturally in colorless, red, orange, brown, yellow and green varieties.
Should not be confused with Cubic Zirconia. Zircon is a lustrous gemstone that comes in colors ranging from golden brown to red to violet to blue. Pure zircon is colorless
A mineral consisting of zirconium silicate, typically brown.
a silicate mineral, ZrSiO4, diamondlike in appearance, that contains silica silicon dioxide, and the element zirconium. Some zircons in meteorites contain material from the period before the Solar System formed.
A mineral, zirconium silicate; used as a refractory.
Natural gemstones that, in colorless variety, are very similar in appearance to diamonds, though are much softer and are easily scratched. Also come in brown and green and, if heated, can appear in blue or golden shades.
Gemstone which ranges in colour through yellow, red and orange to green. Colourless, golden-brown and sky-blue versions are produced by heat treatment. Most of the mineral suitable for gemstones comes from the Far East and Sri Lanka. Yellow and brown shades of zircon were often termed hyacinth, and transparent or colourless types are sometimes known as jargons or jargoons. Colourless zircons are sometimes used as substitutes for diamonds, but are not as hard or brilliant.
Natural zirconium silicate, ZrSiO4 containing 67.23% zirconium oxide, ZrO4, and 32.77% silica, SiO2, is used as a molding medium in steel foundries.