Bowenite jade

Misleading commercial name for the mineral bowenite, a translucent, fine-grained variety of serpentine antigorite, resembling nephrite. Also marketed under the misleading names new jade, serpentine…

Emberlite

Unregistered commercial name for a sodalite syenite, a rock containing orange-yellow fluorescent sodalite. Introduced in connection with the trademark registration for similar material under the…

Epsomite

Official mineral name for magnesium sulfate, also called Epsom salt or bittersalt. Epsomite is named after a bittersalt spring near Epsom in Surrey, England. In…

Chrysopal

Green nickel-bearing variety of opal. So named for the similarity between chrysopal and chrysoprase, a nickel-bearing variety of chalcedony. Also known by the longer-standing name…

Endurite

Denoted as an “unusual gemstone” from India. It contains alternating layers of red jasper and silver-gray hematite. That sounds like banded iron stone, also known…