Micro-WorldSummer 2020 - Volume 56, Issue 2, Summer 2020, Vol. 56, No. 2
Quarterly Crystal: Pyrite in Quartz
John I. Koivula, Nathan Renfro
Figure 1. This example of Colombian pyrite-containing rock crystal weighs 466.27 ct and measures 61.90 mm in length. Photo by Diego Sanchez. Figure 1. This example of Colombian pyrite-containing rock crystal weighs 466.27 ct and measures 61.90 mm in length. Photo by Diego Sanchez. 
