Rainbow quartz
Commercial name for natural quartz in which rainbow colors occur due to refraction of light on internal fracture surfaces. Other names used for quartz with…
Category: Gem or Scam? Library
Rainbow moonstone
Commercial name for white feldspar with a form of blue or multi-colored ‘flash’ or pearlescent luster. Rainbow moonstone is perhaps the most popular ‘moonstone’ currently…
Rainbow obsidian
Commercial name for natural black volcanic glass with multicolored iridescence caused by inclusions of nanoparticles of the mineral hedenbergite. Rainbow obsidian is often cut such…
Rainforest jasper/rhyolite
Commercial name for a predominantly green volcanic rock with brown and orange spots in round structures. The rock is a rhyolite and not a jasper…
Rhodatrolite
Commercial name for a pink variety of the mineral natrolite, from a site on the island of Nusa Kambangan, off the south coast of central…
Rhodochrosite
Official mineral name for a mainly pink-colored manganese-containing carbonate. The mineral can have many appearances. Polished stones for use in jewelry or for objects usually…
Rhodo Silica™
Unregistered commercial name for a combination of pink rhodonite, translucent quartz and sometimes black manganese. Robert Simmons (Heaven & Earth) coined the name for this…
Red / pink / peach aventurine
Commercial name for a red or pink quartz variety with shimmering inclusions of a mica variety (such as lepidolite) or hematite. No analysis is known.…
Red tiger’s eye
Commercial name for a red to reddish-brown variety of tiger’s eye, also called Dragon’s Eye, cat’s eye or bull’s eye. Red tiger’s eye rarely occurs…
Smoky quartz
Mineralogical name for a smoky-gray, brown to black variety of quartz that owes its color to the presence of trace aluminum built into the crystal…
