BASALT | Basalt makes up a large majority of the earth's oceanic crust. Formed quickly from a magma that is rich in iron, basalt exhibits a dark color and small crystal size GREAT FOR GEOLOGY CLASSROOMS | The perfect example of an aphanitic igneous rock. Useful for lessons in igneous rock classifica...

BASALT | Basalt makes up a large majority of the earth's oceanic crust. Formed quickly from a magma that is rich in iron, basalt exhibits a dark color and small crystal size GREAT FOR GEOLOGY CLASSROOMS | The perfect example of an aphanitic igneous rock. Useful for lessons in igneous rock classifica...

MUSCOVITE MICA | Muscovite mica is a mineral that forms from cooling magma. It forms in thin sheets that are individually weak, but comprehensively strong. Mica is a major component in a plethora of different rocks, including igneous, sedimentary, and metamorphic rocks GREAT FOR GEOLOGY CLASSROOMS |...

PORPHYRITIC GRANITE | Granite forms slowly in shallow or evolved magma chambers, and is also commonly found as magmatic intrusions in the crust. The large crystals are indicative of a slow cooling rate, and make mineral identification simple GREAT FOR GEOLOGY CLASSROOMS | A must-have sample when dis...

RHYOLITE | Rhyolite is an aphanitic felsic rock which forms during eruptions of thick, viscous magma. Often containing phenocrysts of felsic minerals with only slightly higher crystallization temperatures than the feldspar and quartz that forms rhyolite GREAT FOR GEOLOGY CLASSROOMS | Ideal for ident...

AUGITE | A common rock-forming pyroxene mineral that forms as magma is cooling. It is an imperative sample for lessons on Bowen's reaction series GREAT FOR GEOLOGY CLASSROOMS | Ideal for identification & classification exercises. Augite's perpendicular planes of cleavages make it an excellent tool f...

BASALT | Basalt makes up a large majority of the earth's oceanic crust. Formed quickly from a magma that is rich in iron, basalt exhibits a dark color and small crystal size GREAT FOR GEOLOGY CLASSROOMS | The perfect example of an aphanitic igneous rock. Useful for lessons in igneous rock classifica...

EXPLORE TECH CUT IGNEOUS ROCKS || A fun introduction to the world of geology through igneous rocks! Igneous rocks are formed when magma or lava cools and solidifies. Each Tech Cut specimen is selected and hand processed by an actual geologist, ensuring each sample exhibits defining features. Eisco L...

PORPHYRITIC GRANITE | Granite forms slowly in shallow or evolved magma chambers, and is also commonly found as magmatic intrusions in the crust. The large crystals are indicative of a slow cooling rate, and make mineral identification simple GREAT FOR GEOLOGY CLASSROOMS | A must-have sample when dis...

PORPHYRITIC GRANITE | Granite forms slowly in shallow or evolved magma chambers, and is also commonly found as magmatic intrusions in the crust. The large crystals are indicative of a slow cooling rate, and make mineral identification simple GREAT FOR GEOLOGY CLASSROOMS | A must-have sample when dis...

PINK GRANITE | Commonly found as magmatic intrusions in the crust, granite forms slowly in shallow or evolved magma chambers. The large crystals are indicative of a slow cooling rate, and make mineral identification simple GREAT FOR GEOLOGY CLASSROOMS | Ideal for identification & classification exer...

MUSCOVITE MICA | Muscovite mica is a mineral that forms from cooling magma. It forms in thin sheets that are individually weak, but comprehensively strong. Mica is a major component in a plethora of different rocks, including igneous, sedimentary, and metamorphic rocks GREAT FOR GEOLOGY CLASSROOMS |...

【Perfect Size】These rocks are about 1/5 inch on average, feature a subtle variation in shape to enhance the visual appeal of your cherished plants, adding a touch of natural diversity to your garden. 【Excellent Match】Our blend of lava rocks and gravels is rich in weakly acidic properties, ma...