Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
igneous
Category
Anthropogenic (Man Made Industrial Byproduct)
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Tumbled metallic sulfide mineral specimen, likely pyrite-bearing ore
Likely pyrite (FeS₂) with associated sulfides and host rock; exact identification requires testing
mineral
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Agate (Dyed High-Grade Polished Slice)
Silicon dioxide (SiO2), Chalcedony crystal variety
mineral
Crushed Limestone
Calcium Carbonate (CaCO3)
Sedimentary
Granite
Granite (a plutonic rock)
Igneous
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chalcanthite
Hydrated copper(II) sulfate (CuSO4·5H2O)
mineral
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Green cabochon gemstone, likely aventurine or dyed chalcedony
Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony
gemstone
Coal
Carbonaceous sedimentary rock
sedimentary
BROWN GRANITE (likely 'Tan Brown' or similar)
Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)
igneous
Granite (weathered pebble)
Granite (plutonic igneous rock)
Igneous
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Sulfur
Native Sulfur (S)
mineral
Quartzite (Lithic Artifact)
Quartzite (SiO2)
metamorphic
Emerald
Beryl (Be3Al2Si6O18), specifically the green variety colored by chromium or vanadium
Mineral (Gemstone variety of Beryl)
Sulfur
Native Sulfur (S)
mineral
Scoria
Scoriaceous Basalt
igneous
Corundum
Corundum (Al2O3)
Mineral
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Granodiorite
Granodiorite
Igneous
Sandstone Chert/Quartzite
Silicon Dioxide (SiO2) - Sedimentary Sandstone / Orthoquartzite
sedimentary
Granite Gravel (Pebble)
Intrusive Felsic Igneous Rock
igneous
Coquina
Bioclastic Limestone
sedimentary
Nephrite Jade
Nephrite
Mineral/Rock
Exposed aggregate concrete (stone-chip surface)
Portland-cement concrete containing natural aggregate; not a natural rock
sedimentary
Quartz
Silicon Dioxide (SiO₂)
Mineral
Polished/tumbled brown-and-white mineral fragment
Indeterminate; possibly quartz-rich jasper, brecciated jasper, or an iron-stained quartz mineral
mineral
Fluorite (Fluor-spar)
Calcium Fluoride (CaF2)
mineral
Fluorite (Purple/Blue variety)
Calcium Fluoride (CaF2)
mineral
Blue-green chrysocolla rough specimen
Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite
mineral
Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone composed of Hematite and Shell remains)
sedimentary
Silver (Native Element)
Ag (Argentum)
mineral
Obsidian
Obsidian (volcanic glass)
Igneous
Chert / Flint
Chert (varieties include Flint)
Sedimentary
Chalcedony (Common Opal/Chert variety)
Silicon Dioxide (SiO2)
mineral
Dark river-worn cobble, possibly basalt or fine-grained volcanic rock
Likely basaltic rock; exact identification requires a fresh surface and tests
igneous
Vanadinite
Lead Chlorovanadate, Pb5(VO4)3Cl
mineral
Seraphinite
Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.
Mineral
Peridot
Olivine (specifically, the gem-quality variety forsterite, (Mg,Fe)2SiO4)
Mineral