Onyx is a banded variety of chalcedony (quartz).
Onyx may also refer to:
Locations Onyx, California, a census-designated place located in Kern County, California Onyx, Arkansas Onyx Cave (disambiguation), a common name for caves in the United States Onyx River, a meltwater stream in the Antarctic The Onyx Club, a jazz club in Pasadena, California, part of The Hotel Carver Onyx Club (New York City), a jazz club on 52nd Street, in Manhattan, New York City
Entertainment Onyx, a fictitious planet set in the Halo franchise, mentioned in the novel Halo: Ghosts of Onyx and the Halo Halo TV series Onyx, a 2005 episode of the TV series Smallville Onyx (wrestler), pro wrestler Kyle McNeely
Characters Onyx (comics), a fictional comic book character in the DC Universe, mainly associated with the Batman titles Onyx Von Trollenberg, a character from the animated series Trollz
Medicine Onyx (interventional radiology), EVOH based liquid embolic agent Onyx Pharmaceuticals, a drug manufacturer
Organizations Onyx (architectural collective), an architectural collective that practiced in New York City from 1968 to 1972 Onyx Collective, a content brand owned by Disney Entertainment championing projects from individuals belonging to underrepresented groups Onyx Creative, an US architecture and design firm Veolia Environmental Services, formerly Onyx Environnement Onyx Grand Prix, a short-lived Formula One team, 1989–1990 Onyx Sports Cars, a UK kit car manufacturer
Technology SGI Onyx, a line of symmetric multiprocessing computers from Silicon Graphics Synaptics Onyx, a concept cellphone designed to display Synaptics ClearPad technology Onyx International Inc, a company producing the Onyx Boox ebook readers Onyx (satellite), a code name often associated with newer variants of the Lacrosse satellite Onyx (interception system), a Swiss intelligence gathering system Onyx-015, an adenovirus being researched for cancer treatment OnyX, a freeware system maintenance and optimization tool for Mac OS X Onyx Systems, a company that made computer systems based on the Zilog Z8000 microprocessor and Bell Labs' Unix BlackBerry Bold 9700 (codenamed "Onyx"), a smartphone from RIM
Vessels USS Onyx (PYc-5), a United States Navy patrol vessel of the mid-20th century HMS Onyx, the name of seven ships of the Royal Navy MS Onyx, a passenger ferry formerly known as Fennia and Casino Express Music Onyx (hip hop group), a Queens-based hip-hop group Onyx (Cornish band), a Cornish 1960s band The Onyx Hotel Tour, 2004 tour by pop singer Britney Spears Onyx (DJ), an Israeli DJ
Albums Onyx (Pop Evil album), 2013 Onyx (Ava Inferi album), 2011
Other uses Onyx (game), a strategy board game invented by Larry Back Onyx: Black Lesbian Newsletter, a 1980s Californian magazine Onyx, a Monotype typeface Peugeot Onyx, a concept car produced by the French car manufacturer Peugeot
See also Onix (disambiguation) P-800 Oniks, a Russian/Soviet supersonic anti-ship cruise missile