Rock and Mineral Specimens and Collections
Eisco™ Limonite Mineral Specimen
Limonite, also known as goethite, is an iron hydroxide mineral, a chemistry that is apparent from the mineral's rusty ochre color. This mineral was used extensively as pigment for yellow, red, and orange dyes, going back all the way to Neolithic cave paintings.
Eisco™ Pumice Specimen
Pumice is formed quickly during volcanic eruptions around pockets of air within lava.
Eisco™ Mica Schist Specimen
Mica Schist Specimen for use in lessons on metamorphic rock properties, classification, and identification.
Eisco™ Chalcopyrite Mineral Specimen
From the same family as fool's gold, Chalcopyrite is a yellow crystalline mineral consisting of a sulfide of copper and iron. It's the principal ore of copper formed in hydrothermal veins.
Eisco™ Andesite Specimen
Andesite Specimen for introduction to igneous rock classification and identifying minerals within igneous rocks.
Eisco™ Red Slate Metamorphic Rock Specimen
Red 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™ Pegmatite Igneous Rock Specimen
Pegmatite is an igneous rock that contains two vastly different crystal sizes. This combination of both phaneritic and aphanitic crystals indicates this rock formed at two vastly different cooling rates.
Eisco™ Loadstone Mineral Specimen
Loadstone is a naturally magnetized mineral that creates it's own magnetic field and can pick up small metal objects. Iron particles cover its surface.
Eisco™ Oolitic Limestone Sedimentary Rock Specimen
Oolitic limestone is a carbonate rock formed from the cementation of thousands of ooids, tiny nodules formed from the accumulation of carbonate material around a nucleus. Oolitic limestone forms in reef or lagoon environments.
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.
Eisco™ White Quartzite, Metamorphic Rock Specimen - Approx. 1 Inch - 10 Pack
Quartzite is formed from sandstone that has been tightly compressed to the point where the clasts have recrystallized to form a new rock. This formation mechanism, coupled the inherent strength of quartz, makes quartzite a very durable rock.
Eisco™ Raw Chlorite, Metamorphic Mineral Specimen - Approx. 3 Inch
Chlorite is a metamorphic mineral that has undergone light alteration. During metasomatism, phyllosilicate minerals may become hydrated and form chlorite.
Eisco™ Limestone Specimen
Limestone Specimen is made up of mostly calcium carbonate and organic material.
Eisco™ Fluorite Mineral Specimen
Fluorite Mineral Specimen is used in classroom identification lab exercises and for study of uncommon 4-plane cleavage pattern.
Eisco™ Hornfels Specimen
Hornfels forms in narrow band between an igneous intrusion and surrounding rock.