Moqui Marbles
Commercial name for round sandstone concretions from the Navajo Sandstone Formation in the United States. Although most Moqui stones come primarily from Utah, where the…
Category: Gem or Scam? Library
Morondavite
Commercial fantasy name for a breccia-like rock described as a combination of agate, jasper and chalcedony in quartz and again a “new” stone from Madagascar.…
Mtrolite / Mtorolite / Mtorodite
Commercial name for a deep green chromium-containing chalcedony from Zimbabwe. Named after Mtoroshanga, the site of discovery in Zimbabwe. Similar to the more common chrysoprase,…
Mugglestone
Commercial name for tiger iron, a combination of tiger’s eye, hematite and red jasper. Several commercial names are used for the same material: Ancestralite, Endurite,…
Mystic Merlinite™
Commercially registered trade name for a gray, violet translucent gabbro rock speckled with black. Although still touted as a relatively “newly” discovered gemstone, found only…
Mystic quartz
Commercial name for quartz coated with a fine layer of metal to create a rainbow of colors. Similar to the various types of aura quartz.…
Mystic topaz
Commercial designation for treated topaz, usually applied to colorless or light blue, faceted stones. In this treatment, the stone is coated with a thin metal…
Nebula Stone™ / nebula jade
Commercial name for a rock with light green spots or “eyes” visible on a dark background. Exact composition or scientific name is not unambiguous. The…
Nellite
Commercial name for a stone with a mainly yellow-brown to golden appearance, sometimes with blue spots or streaks, from Namibia or South Africa. There are…
New Jade
Misleading commercial name for the mineral bowenite, a translucent, fine-grained variety of serpentine antigorite, resembling nephrite. Also called bowenite jade and marketed under the misleading…
