Anyolite

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Anyolite with embedded ruby ​​in an almost idiomorphic form from Tanzania
Anyolit sculpture "Sea World" - exhibited at the Carnegie Museum of Natural History in Pittsburgh , Pennsylvania, USA
Detailed view of anyolite with zoisite, ruby ​​and the Ca-amphibole pargasite

Anyolite (also Anyolith , Rubinzoisit or Zoisitfels ) is a metamorphic formed mineral mixture, consisting predominantly of the green variety of Minerals Zoisit and the red, opaque Korundvarietät Rubin exists. The in-grained matrix of Zoisits disseminated rubies are often irregularly shaped, but can also idiomorphic have hexagonal structure. In addition, greenish-black to black deposits from minerals of the amphibole group (hornblende) are often found in the zoisite .

Was first discovered in 1954 in the anyolite Mundarara mine in the district Longido in Tanzania . For more than 50 years Tanzania, more precisely Longido as well as Lossogenoi and Naberera in the Simanjiro district (see also corundum finds in Africa ), was the only place where Anyolite was found. Only in 2008 was the discovered by Andreas Ertl, Franz Brandstätter and Markus Prem "anyolite lenses" from the Moldanubicum about three kilometers south of Drosendorf in the Lower Austrian town of Drosendorf-Zissersdorf discloses another location for anyolite.

It got its name from the local Maasai because of its predominantly green color . “Anyole” is the Maasai word for green .

Due to its mostly strong colors and color contrasts, Anyolit is used for the production of jewelery and ornamental stones as well as for handicraft objects, which when ground and polished develop a glass-like shine . There is only a risk of confusion if the color is similar, green fuchsite with embedded rubies.


See also: List of individual mineral mixtures and List of mineral jewelery and precious stones

literature

  • Rudolf A. Thurm: The Lake-Manyara-emeralds of Tanzania . In: The Journal of Gemmology . tape 13 , no. 3 , 1972, p. 98-99 (English).
  • Andreas Ertl, Franz Brandstätter, Markus Prem: Moldanubian corundum deposits with ruby ​​and sapphire near Drosendorf, Waldviertel, Lower Austria . In: Mitt. Österr. Mineral. Ges. Band 154 , 2008, p. 45–51 ( uibk.ac.at [PDF; 109 kB ; accessed on July 27, 2020]).
  • Walter Schumann: Precious stones and gemstones. All kinds and varieties. 1900 unique pieces . 16th, revised edition. BLV Verlag, Munich 2014, ISBN 978-3-8354-1171-5 , pp. 176 .
  • Jaroslav Bauer, Vladimír Bouška, František Tvrz: Gemstone guides . Verlag Werner Dausien, Hanau / Main 1993, ISBN 3-7684-2206-2 , p. 206 .

Web links

Commons : Anyolit  - collection of images, videos and audio files
  • Anyolite. In: mindat.org. Hudson Institute of Mineralogy, accessed July 27, 2020 .

Individual evidence

  1. ^ Dietmar Schwarz: Tanzania . In: ruby, sapphire, corundum. Beautiful, hard, rare, precious (= Christian Weise [Hrsg.]: ExtraLapis . Band 15 ). Weise, Munich 1998, ISBN 3-921656-45-1 , p. 54-55 .
  2. ↑ Torsten Purle: Ruby-Zoisite - Properties, Origin and Use. In: steine-und-minerale.de. Stones & Minerals, November 5, 2019, accessed July 27, 2020 .
  3. ↑ Hobart M. King: Zoisite and Clinozoisit. In: Geology.com. Retrieved July 27, 2020 .