Schist (Greenschist / Mica Schist)
Metamorphic rock rich in platy minerals (e.g., Chlorite/Mica schist)
metamorphic
Category
Mineral_rock
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Greenstone with Quartz Veining
Epidiorite or Metabasalt with SiO2 (Quartz) veins
metamorphic
Gneiss (Cobble)
Gneiss
metamorphic
Granite
Granite (composed primarily of Quartz, Potassium Feldspar, Plagioclase, and Biotite/Amphibole)
igneous
Fossilized Shark Tooth
Chondrichthyes (class)
fossil
Amygdaloidal Basalt
Amygdaloidal Basalt with Secondary Infilling (e.g., Agate, Quartz, or Zeolite)
igneous
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
K2 stone (azurite–granite)
Biotite granite hosting blue azurite (Cu₃(CO₃)₂(OH)₂), often with malachite and quartz
igneous
Chrysocolla-rich copper ore
Chrysocolla, a hydrated copper aluminosilicate (approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O), possibly mixed with malachite or turquoise-group minerals
mineral
Vesicular basalt (likely weathered lava rock)
Vesicular basalt; primarily plagioclase feldspar, pyroxene, and volcanic glass, with possible iron-oxide alteration
igneous
Gneiss
Gneiss
metamorphic
Shark Tooth Fossil
Otodus obliquus (or similar prehistoric lamniform shark tooth)
fossil
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Glacial Granite with Epidote
Granite featuring Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
igneous
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
sedimentary
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Note: No specimen visible
N/A
Gneiss (Hornblende/Biotite Gneiss)
Foliated Metamorphic Rock (Quartz-Feldspar-Amphibole/Mica matrix)
metamorphic
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Limonite Nodules / Goethite
Hydrated Iron Oxide-Hydroxide (FeO(OH)·nH2O / Fe2O3·nH2O)
mineral
Rock Crystal Quartz
Silicon Dioxide (SiO2)
mineral
Basalt with Calcite Veins
Aphanitic mafic volcanic rock with CaCO3 inclusions
igneous
Gneiss
Gneiss
metamorphic
Coprolite
Fossilized Feces
fossil
Gneiss (specifically a granitic gneiss cobble)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Ferruginous Sandstone (Gozzan)
Iron-rich clastic sedimentary rock with Limonite/Goethite
sedimentary
Biotite-bearing granite
Granite, composed mainly of quartz (SiO₂), potassium feldspar, plagioclase, and biotite mica
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Gravel Pebble)
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Sandstone (lithic arenite or arkose with iron oxide)
sedimentary
Bauxite
Aluminium ore / Hydrated aluminium oxides (AlOx(OH)3-2x)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz-bearing iron-stained breccia
Brecciated quartz/quartzite with iron oxides, chiefly SiO₂ with hematite/goethite and possible feldspar or host-rock fragments
mineral
Gneiss
Gneiss
metamorphic
Talc
Talc (Hydrated magnesium silicate, Mg3Si4O10(OH)2)
metamorphic
Gneiss
Gneiss
metamorphic
Yellow Agate (Banded Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Bauxite
Bauxite (Al(OH)3 mixed with Fe2O3 and clay minerals)
sedimentary
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
mineral