Rock and Mineral Specimens and Collections
Eisco™ Syenite Igneous Rock Specimen
Syenite is a variety of felsic igneous rock heavily composed of feldspar. Though formed similarly to granite, the higher aluminum content of syenite indicates a more evolved magma.
Eisco™ Green Slate Metamorphic Rock Specimen
Green slate is a very lightly metamorphosed and well-foliated specimen. It can be distinguished from it's parent rock (Shale) by the difference in pitch when struck.
Eisco™ Apatite Specimen
Apatite is a common phosphate mineral often found as an accessory mineral in igneous rocks or as concretions or detrital clasts in sedimentary rocks. A standard Mohs hardness of 5 and a relatively uncommon crystal habit.
Eisco™ Albite Specimen
Albite is a variety of plagioclase feldspar that is rich in sodium. With a glossy sheen, 2 planes of cleavage, and a standard hardness of 6, this mineral is a classic specimen for lessons in mineralogy and petrology. Useful when trying to distinguish from other feldspars.
Eisco™ Red Sandstone Specimen
Red Sandstone Specimen is made up of well-sorted and well-rounded grains of quartz.
Eisco™ Talc Mineral Specimen
Talc Mineral Specimen is at bottom of Mohs scale of hardness, and has distinct soapy feel.
Eisco™ Slate Specimen
Slate Specimen for use in metamorphic classification and identification exercises.
Eisco™ Lodestone Mineral Specimen
A naturally magnetized mineral that creates its own magnetic field and can pick up small metal objects.
Eisco™ Porphyritic Granite Specimen
Porphyritic Granite Specimen is a must-have sample when discussing rock types, rock cycle, formation, classification, and identification of igneous rocks.
Eisco™ Calcite Mineral Specimen
Calcite Mineral Specimen is used in classroom identification labs, exercises, and lessons on chemical reactions.
Eisco™ Mica Garnet Schist Specimen
Mica Garnet Schist Specimen for use in lessons on metamorphic rock properties, classification, and identification.
Eisco™ Diorite Specimen
Diorite Specimen straddles the line between mafic and felsic rock chemistry.
Eisco™ Albite Mineral Specimen
Albite Mineral Specimen ideal for use in lessons about the Mohs hardness scale.
Eisco™ Oolitic Limestone Specimen (Sedimentary Rock)
Oolitic limestone is a carbonate rock formed from the cementation of thousands of ooids.
Eisco™ Greywacke Sedimentary Rock Specimen
Graywacke is a sedimentary rock composed of large, angular clasts within a fine-grained clay matrix. Formed during underwater avalanches, these rocks are often found on distal ocean shelves.