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Onyx

Onyx is a banded variety of chalcedony, a cryptocrystalline form of quartz. The colours of its bands are white and black. It is usually cut as a cabochon, or into beads, and is also used for intaglios and cameos. Some onyx is natural but much is produced by the staining of agate. Technical Details Chemical Composition and Name SiO2 - Silicon dioxide Hardness (Mohs Scale) 7 Specific Gravity* 2.65 - 2.66 Refractive index (R.I.) 1.543 - 1.552 to 1.545 - 1.554 Birefringence 0.009 Optic Sign Positive Optical Character Uniaxial
  • For information about Specific Gravity, see Density
See also: List of minerals.
Onyx is also the name of a Queens, NY rap group.

The above article is adapted from from Wikipedia All Wikipedia article text is available under the terms of the GNU Free Documentation License




Precious Angels: A True Story of Two Slain Children and a Mother Convicted of Murder (Onyx True Crime, Je 853) by Barbara Davis

Who Killed Jonbenet Ramsey?: A Leading Forensic Expert Uncovers the Shocking Facts (Onyx True Crime, Je 871) by Cyril H. Wecht

Every Mother's Nightmare (Onyx True Crime) by Charles Bosworth

Burglars Can't Be Choosers (Onyx Mystery) by Lawrence Block

Onyx by Felice Picano

Emotion and Gender: Constructing Meaning from Memory (Gender and Psychology) by June Crawford

ONYX, THE by JACQUELINE BRISKIN

Blood Brothers: The Inside Story of the Menendez Murders (Onyx True Crime ; Je 547) by Ron Soble

To Kill and Kill Again (Onyx True Crime ; Je 323) by John Coston

The Onyx by Jacqueline Briskin

Winter Roses (Onyx Historical Romance, No 292) by Anita Mills

Blind Rage (Onyx True Crime, Je 532) by Gary C. King

Mefisto in Onyx by Harlan Ellison

Sideshow (Onyx Fiction) by Anne D. Leclaire

Innocent Victims (Onyx True Crime, Je 357) by Scott Whisnant


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Note again ... some material here is adapted from from Wikipedia All Wikipedia article text is available under the terms of the GNU Free Documentation License

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