Hiddenite is a green to yellowish green colored by chromium additions variety of the mineral spodumene. Other varieties are the Kunzite and the bright yellow Triphan.

The Hiddenite is named after the American explorer William Earl Hidden (1853-1918), who found the gem in 1879 in Alexander County in the U.S. state of North Carolina.

Hiddenite is used exclusively as a gemstone. Like Kunzite, he will invest primarily, rare provided with step-cut brilliant cut. It is important to pay attention to the orientation of the crystal axes, as spodumens are strongly pleochroic, meaning that the colors change in different directions of the crystalline structure between bluish green, emerald green and yellow-green. So that the brick after the section shows strong colors, therefore, the table facet is usually aligned perpendicular to the major axis.