Amazonite, also known as amazonstone,[4] is a green tectosilicate mineral, a variety of the potassium feldspar called microcline.[4][5][6] Its chemical formula is KAlSi3O8,[1][7] which is polymorphic to orthoclase.
Its name is taken from that of the Amazon River, from which green stones were formerly obtained, though it is unknown whether those stones were amazonite.[4] Although it has been used for jewellery for well over three thousand years, as attested by archaeological finds in Middle and New Kingdom Egypt[8] and Mesopotamia, no ancient or medieval authority mentions it. It was first described as a distinct mineral only in the 18th century.[9]
Green and greenish-blue varieties of potassium feldspars that are predominantly triclinic are designated as amazonite.[10] It has been described as a "beautiful crystallized variety of a bright verdigris-green"[11] and as possessing a "lively green colour".[4] It is occasionally cut and used as a gemstone.[12]
^ abWalter, Schumann (1997). Gemstones of the world (Rev. & expanded ed.). New York: Sterling Pub. Co. p. 164. ISBN 0806994614 – via Internet Archive.
^"Radioactive Gems : ClassicGems.net". ClassicGems.net. Archived from the original on 2021-02-11. Retrieved 2021-08-13.
^Schlegel, Dorothy McKenney (1957). "Gem Stones of the United States". Geological Survey Bulletin (1042-G). United States Government Publishing Office – via Google Books.
^ abcdOne or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Amazon-stone". Encyclopædia Britannica. Vol. 1 (11th ed.). Cambridge University Press. p. 791.
^"Amazonite gemstone information". gemdat.org. Archived from the original on 2021-03-01. Retrieved 2018-08-24.
^"Amazonite".
^"Amazonite: Amazonite mineral information and data". mindat.org. Archived from the original on 14 May 2021. Retrieved 13 April 2017.
^Harrell and Osman 2007
^Mikhail Ostrooumov, Amazonite: Mineralogy, Crystal Chemistry, and Typomorphism (Elsevier, 2016), p. 1–12.
^Pivec, E.; Ševčik, J.; Ulrych, J. (December 1981). "Amazonite from the alkali granite of the Avdar Massif, Mongolia". TMPM Tschermaks Petr. Mitt. 28 (4): 277–283. Bibcode:1981TMPM...28..277P. doi:10.1007/BF01081855.
^Chisholm, Hugh, ed. (1911). "Microcline" . Encyclopædia Britannica. Vol. 18 (11th ed.). Cambridge University Press. p. 380.
^"Common Minerals of Virginia". Virginia Department of Mines, Minerals and Energy. Commonwealth of Virginia. Archived from the original on 24 July 2021. Retrieved 5 July 2019.
Amazonite, also known as amazonstone, is a green tectosilicate mineral, a variety of the potassium feldspar called microcline. Its chemical formula is...
low-temperature variety of orthoclase or partially disordered microcline Amazonite (sometimes called "Amazon stone"), a green variety of microcline This...
ornaments were made of amazonite while the tubular bead ere made of jasper and amber while the small circular beads were made of amazonite, crystal or amber...
or orthoclase with thin lamellae of exsolved albite. Amazon stone, or amazonite, is a green variety of microcline. It is not found anywhere in the Amazon...
institutional green when used as a pigment. For many years, the source of amazonite's color was a mystery. Widely thought to have been due to copper because...
and not found again until 1912. It contained Colombian emerald, topaz, amazonite from Brazil, spinel, iolite, and chrysoberyl from Sri Lanka, ruby from...
center and smoky quartz and amazonite can be found in many areas within four miles (6 km) of the summit. For example, amazonite can be found next to Barr...
Pikes Peak granite. Probably the most famous mineral from the area is amazonite, a bluish form of microcline feldspar that is relatively rare in other...
surrounds and eyebrows), quartz (the eyes), obsidian (the pupils), carnelian, amazonite, turquoise, and faience. When it was discovered in 1925, the 2.5 kg (5...
of granitic composition, containing large clasts of gemstones such as amazonite, garnet, and topaz. Phaneritic (phaner = visible) textures are typical...
(15 ft) × 1.8 m (5 ft 11 in). The gem varieties of potassium feldspar, amazonite and moonstone are variant colored perthites. Le Maitre R.W.; Streckeisen...
generally made of gold, silver, copper, stones like lapis lazuli, turquoise, amazonite, quartz, etc. Many of the male figurines also reveal the fact that men...
large crystals occur in mica-schist. It is also found with topaz and amazonite in the granite of the Ilmen Mountains in the southern Urals and of the...
Alexandrite (variety of chrysoberyl) Allingite (synonym of amber) Alum Amazonite (variety of microcline) Amethyst (purple variety of quartz) Ametrine (variety...
side to his mining operation designed to secure the world's supply of Amazonite for his own egomaniacal use. "Block Busters" - Paulie Sludger, a corrupt...
minerals as they also desired decorations made of apatite, turquoise, amazonite, or serpentinite for their aesthetic qualities. There is evidence that...
tin, tungsten, niobium, tantalum, beryllium, lead, zinc and copper. Amazonite is present and was reportedly mined by the ancient Libyan civilization...
dream, but paid the price of losing sight. The name Tianhe comes from amazonite. Han Lingsha (韓菱紗) came from a clan living on tomb raiding for generations...
North Macedonia. It can be confused with perovskite. It is found in an amazonite-rich area. Lead titanate, which is the premier piezoelectric material...
Global Information
Radioactive 14.05% (K)