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© 2013-2019 by PetroViewer.

PetroViewer's stock Terrestrial sections are chosen with most consideration given to attractive, large, birefringent crystals.  The availability of many of these makes them most economical.

Ashland Feldspar mineral crystals seen through a PetroViewer
Blanchard Red mineral crystals seen through a PetroViewer
Peridotite mineral crystals seen through a PetroViewer
Blanchard White mineral crystals seen through a PetroViewer
California's Ward Creek Amphibole mineral crystals seen through a PetroViewer