Sedonalite / Sedona sandstone
Unregistered commercial name for a type of red sandstone native to Sedona in the U.S. state of Arizona. In the 1980s, Sedona became an important…
Category: Gem or Scam? Library
Zarinite
Commercial name for a colorful copper-rich weathering product (“gossan“) from Altai, Russia, containing a mixture of secondary minerals of copper and iron, including malachite, azurite,…
Selenite
Official name for the translucent variety of the mineral gypsum, but in trade mainly used for the fibrous variety of gypsum, satin spar. The name…
Zebra jasper/marble
Commercial name for black and white striped or mottled rock of unknown composition and origin. Sometimes containing quartz, but not true jasper. In some cases…
Zebra Rock / Zebra Stone (red-brown and white banded)
Commercial name for a typical reddish-brown and white banded sedimentary rock native to Australia. The siltstone consists mainly of small particles of quartz and sericite…
Serpentine jade
Misleading commercial name for the mineral bowenite, a translucent, fine-grained variety of serpentine antigorite, resembling nephrite. Also marketed under the misleading names bowenite jade, new…
Zebra Stone (Green; green and white banded)
Commercial name for serpentine with chrysotile (a fibrous mineral from the asbestos group). Sometimes also offered as Zebra jasper, but usually the latter refers to…
Sesame jasper
Misleading commercial name for a light-colored with black speckled rock, which also contains grayish-white grains of quartz. In any case, it is not jasper, but…
Silver eye (serpentine)
Commercial name for serpentine with chrysotile (a fibrous mineral from the asbestos group). Sometimes also offered as Zebra jasper, but usually the latter refers to…
Zincite
Official mineral name for a natural zinc oxide. Unfortunately, most zincite crystals on the market are synthetic, that is, man-made in a laboratory. In Judy…
