Nirvana (Ice) quartz
Commercial name for natural quartz with intermittent growth (irregular shapes and partial crystal faces) from the Himalayas. Also called (Himalayan) Ice quartz or interference quartz.…
Category: Gem or Scam? Library
Northern Light Stone
Commercial name for a metamorphic rock from Norway, a fuchsite schist or gneiss. The rock contains at least the green mica fuchsite and quartz; some…
Novaculite
Designation for a variety of chert. It is a fine-grained hard rock composed mainly of extremely fine-grained to cryptocrystalline quartz. It can be white, gray…
Nuummite
An unofficial name for a dark metamorphic rock with elongated, golden iridescent crystals composed of alternating lamellae of anthophyllite and gedrite (ortho-amphiboles). Its appearance is…
Obsidianite / emerald obsidianite
Deceptive name for man-made glass, whether mixed with volcanic ash or not, sold as natural volcanic glass. Man-made “volcanic” glass is mainly offered under the…
Ocean Jasper™
Commercially registered trade name used for a multicolored silicified rhyolite or tuff from Madagascar. In this originally volcanic rock, quartz or chalcedony and feldspar have…
Oceanite
Another marketing name for blue-colored (aqua) calcite from Argentina. Also called Aquatine (Calcite)™, Blue Onyx or Lemurian Aquatine Calcite™. Do you still get it? Do…
Onyx / onyx marble
In correct usage, the name onyx refers to a black and white banded agate, a variety of chalcedony. In addition to black and white onyx,…
Orange aventurine
Designation for a quartz variety with shimmering inclusions of a mica variety or hematite. No analysis is known. See aventurine. Do you have a nice…
Oregon Sunstone
Commercial name for a variety of labradorite, a plagioclase feldspar, with a Schiller effect (flash) with an orange/brown color from the state of Oregon, United…
