This is a list of gemstones, organized by species and type. There are gems of the world walter schumann pdf number of artificial and lab grown minerals used to produce gemstones.

This page was last edited on 21 September 2017, at 13:14. Changes must be reviewed before being displayed on this page. This article is about the gemstone. The undulating, contrasting bands of colour and lustre make for an attractive motif and it is mainly used for jewellery-making and ornamentation. Tiger iron is mined primarily in South Africa and Western Australia. It is formed by the alteration of crocidolite. US states of Arizona and California.

These have been cut and sold as “Arizona tiger-eye” and “California tiger’s eye” gemstones. Brazil, Canada, China, Korea and Spain. Red stones are developed by gentle heat treatments. New York, New York: Sterling Publishing. The Encyclopedia of Superstitions By Richard Webster, p. This page was last edited on 23 January 2018, at 08:00. Torrentz will always love you.