Santa Lucia mine, Puno, Peru

60 km WSW of Juliaca in Puno department.

Light blue to greenish blue or banded massive aragonite appeared first at the beginning of the 1990s. The colour is due to a small amount of copper, and similar blue copper-bearing aragonite used to be known in old European literature as "zeiringite". It can be cut into cabochons resembling "larimar", but aragonite is much softer. Aragonite colour is light blue, density 2.75, hardness 3.5, RI 1.52 - 1.66.

A mixture of azurite with unidentified black lustrous grains and malachite is found in the south of the Santa Lucia mine.

Ref: J. Hyrsl, Gemstones of Peru, 2012, p. 36

Gemstone List

Copyright © Jolyon & Katya Ralph 1993-2019. Site Map. Locality, gem & photograph data are the copyright of the individuals who submitted them. For more information please contact the . is an online information resource dedicated to providing free gemmological information to all.