Quartz Crystals on Calcite - San Antonio Mine, Chihuahua, Mexico
Small delicate crystals of bright green fluorescing quartz are peppered around a matrix of calcite on this striking specimen.
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A classic 4-color Franklin piece from the fluorescent mineral capital of the world. Extremely bright canary yellow esperite with blue hardystonite, green willemite and calcite (red) from the Parker shaft in the Franklin Mine, New Jersey.
During its short time of operation, the Parker shaft produced some of the world’s rarest mineral specimens. These rocks have become known as “Parker Shaft Minerals”.