ZIRCON, Entire Valley Harts Range Northern Territory AUSTRALIA (large crystal, miniature)

Zircon is a mineral classified within the nesosilicate group and serves as a primary source of zirconium metal. Its chemical designation is zirconium(IV) silicate, represented by the formula ZrSiO4. An empirical formula that illustrates the substitution range in zircon is (Zr1–y, REEy)(SiO4)1–x(OH)4x–y. This mineral forms from silicate melts and typically contains significant amounts of high field strength incompatible elements, with hafnium commonly found in concentrations between 1% and 4%. Zircon exhibits a tetragonal crystal structure and its natural colors can range from colorless to shades of yellow-golden, red, brown, blue, and green.

The term "zircon" is derived from the Persian word zargun, which translates to "gold-hued." This evolved into "jargoon," a name used for lighter-colored zircons. The English term "zircon" comes from the German Zirkon, reflecting this linguistic evolution. Additionally, yellow, orange, and red varieties of zircon are referred to as "hyacinth," a name inspired by the hyacinthus flower, which has roots in Ancient Greek.