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It crystallizes in isometric cubic habit
Aguja Formation
Ammonite approx
67% nickel
size: 4" x 3" x 0
Mexican Aragonite Xiphactinus It crystallizes in isometric cubicApprox. dimensions: 6. 5" x 5" x 2. 5" Aragonite is a common carbonate mineral. It is unfortunately often thought of as the poor cousin to calcite. But aragonite is an interesting and attractive mineral in its own right. It forms interesting habits and can have a soft pretty color. Its modes of formation and relationship to calcite are both curious and intriguing. Aragonite is a polymorph of calcite, which means that it has the same chemistry as
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