Rock and Mineral Specimens and Collections
Eisco™ Milky Quartz Mineral Specimen
Milky Quartz Mineral Specimen has a tightly packed framework and hardness of 7, complete lack of cleavage planes, and distinct euhedral crystal habit.
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™ Coquina Sedimentary Rock Specimen
Composed of bone and shell fragments, coquina is nearly 100% fossil matter. Held together by a carbonate cement, this skeletal mass forms in low-energy environments such as lagoons and reefs.
Eisco™ Biotite Gneiss Specimen
Biotite Gneiss is high-grade metamorphic rock formed from other rocks undergoing alteration from intense heat and pressure.
Eisco™ Fine White Marble Specimen
Fine White Marble Specimen for use in classroom activities to ascertain differences between metamorphic rocks and their provenance.
Eisco™ Labradorite Sedimentary Rock Specimen
Labradorite is a variety of plagioclase feldspar, intermediate between anorthite and albite. Notable about this species of feldspar is its potential for iridescence.
Eisco™ Hematite Mineral Specimen
This specular variety of hematite takes the form of tiny, sparkling iron oxide crystals.
Eisco™ Hornfels Specimen
Hornfels forms in narrow band between an igneous intrusion and surrounding rock.
Eisco™ Conglomerate Specimen
Conglomerate Specimen has large clasts that indicate that pieces of rock underwent large amount of rolling, bouncing, and other weathering to become round.
Eisco™ Oligoclase Mineral Specimen
Oligoclase is a feldspar with high levels of sodium.
Eisco™ Red Sandstone Specimen
Red Sandstone Specimen is made up of well-sorted and well-rounded grains of quartz.
Eisco™ Albite Mineral Specimen
Albite Mineral Specimen ideal for use in lessons about the Mohs hardness scale.
Eisco™ Fluorite Mineral Specimen
Fluorite Mineral Specimen is used in classroom identification lab exercises and for study of uncommon 4-plane cleavage pattern.
Eisco™ Limestone Specimen
Limestone Specimen is made up of mostly calcium carbonate and organic material.
Eisco™ Travertine Sedimentary Rock Specimen
Travertine is a carbonate rock formed from gushing hot springs. The airy, porous material indicates an abundance of air bubbles moving through the rock as it solidified. Travertine is unique in that it forms as a result of rapidly dropping pH levels.