Excavating Uruguayan Amethyst

[Oxytropidoceras]

How Miners Find and Excavate the Most Expensive Amethysts in the World

Abby Tang and Clancy Morgan, Business Insider, November 20, 2023.

 

Some papers are:

 

Duarte, L.C., Hartmann, L.A., Ronchi, L.H., Berner, Z., Theye, T. and Massonne,

H.J., 2011. Stable isotope and mineralogical investigation of the genesis of

amethyst geodes in the Los Catalanes gemological district, Uruguay, southernmost

Paraná volcanic province. Mineralium Deposita, 46, pp.239-255.

 

Morteani, G., Kostitsyn, Y., Preinfalk, C. and Gilg, H.A., 2010. The genesis of

the amethyst geodes at Artigas (Uruguay) and the paleohydrology of the Guaraní

aquifer: structural, geochemical, oxygen, carbon, strontium isotope and fluid

inclusion study. International Journal of Earth Sciences, 99, pp.927-947.

 

Hartmann, L.A., Wildner, W., Duarte, L.C., Duarte, S.K., Pertille, J., Arena, K.R.,

Martins, L.C. and Dias, N.L., 2010. Geochemical and scintillometric characterization

and correlation of amethyst geode-bearing Paraná lavas from the Quaraí and

Los Catalanes districts, Brazil and Uruguay. Geological Magazine, 147(6), pp.954-970.

 

Hartmann, L.A., Antunes, L.M. and Rosenstengel, L.M., 2014. Stratigraphy of

amethyst geode-bearing lavas and fault-block structures of the Entre Rios

mining district, Paraná volcanic province, southern Brazil. Anais da Academia

Brasileira de Ciências, 86, pp.187-198.

 

Juchem, P.L. and Fischer, A.C., 2004. Agate and amethyst deposits in volcanic

rocks of Paraná Basin, south of Brazil. Field trip guide book, ICAM 2004,

International Congress on Applied Mineralogy, September 19 to 24,2004.

 

Kigai, I.N., 2019. The genesis of agates and amethyst geodes. The Canadian

Mineralogist, 57(6), pp.867-883.

 

Svetova, E.N., Palyanova, G.A., Borovikov, A.A., Posokhov, V.F. and Moroz, T.N.,

2023. Mineralogy of Agates with Amethyst from the Tevinskoye Deposit

(Northern Kamchatka, Russia). Minerals, 13(8), p.1051.

 

Yours,

 

Paul H.