Mineral, Specifically A Rock Fragment

Fossiliferous Concretion

Septarian Concretion containing Brachiopods/Crinoids

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Small polished or naturally worn stone, possibly quartz-bearing rock

Indeterminate from the blurred image; likely quartz (SiO₂) or a pale feldspar-rich fragment

Amethyst (Chevron Amethyst)

Amethystine Quartz (SiO2)

Druzy quartz (quartz-lined rock fragment)

Quartz, SiO₂; likely a druzy coating on a host rock

Serpentine

Serpentine-group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)

Pink Granite

Phaneritic Plutonic Felsic Igneous Rock (Granite)

Chert (specifically Yellow Jasper variety)

Silicon Dioxide (SiO2)

Limestone (specifically Fossiliferous Limestone)

Calcium Carbonate (CaCO3)

Rough amber-colored quartz or calcite fragment

Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Weathered iron-rich rock, possibly limonite-bearing basalt or laterite

Indeterminate; likely Fe-oxide/hydroxide–altered mafic rock, dominated by limonite/goethite with silicate minerals

K2 Jasper (K2 Granite)

Azurite in Granite (Biotite Granite with Azurite inclusions)

Weathered quartz- or feldspar-rich rock fragment

Indeterminate light-colored silicate rock; possibly quartz or feldspar in a granitic fragment

Cobalt Blue Sea Glass

Amorphous Silica Glass (SiO2 + CoO)

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Fossiliferous limestone, possibly a shell or bone fragment

Calcitic limestone; predominantly calcium carbonate (CaCO₃), likely calcite

Unidentified pale mineral or rock surface

Indeterminate from image; possibly a small quartz or feldspar grain

Generic Pebble / Rock Fragment

Lithic fragment / Weathered rock pebble

Brecciated marble (decorative stone slab)

Calcite-rich marble breccia; chiefly calcite (CaCO₃), potentially with dolomite and minor iron oxides

Breccia

Breccia - Clastic sedimentary rock

Breccia

Breccia (Clastic Sedimentary Rock)

Weathered iron-rich rock fragment

Likely limonite/goethite with hematite and iron-bearing silicates; exact identification requires testing

Gneiss (specifically a weathered or stream-worn specimen)

Gneiss (Foliated Metamorphic Rock)

Quartz / Chert

Silicon Dioxide (SiO2)

Fire Opal (in matrix)

Hydrated Silica (SiO2·nH2O)

Pink Granite

Felsic intrusive igneous rock

Sandstone

Clastic sedimentary rock

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Pink Granite

Felsic intrusive igneous rock (Quartz, K-feldspar, Plagioclase)

Unidentified gray mineral/rock fragment

Indeterminate from image; possibly quartz-rich material or mica-bearing schist

Small tan rock fragment

Indeterminate; possibly quartz-rich sandstone or iron-stained quartz

Fire Opal (Common/Precious in Matrix)

Hydrated Silica (SiO2·nH2O)

Pebble / Gravel Fragment

Clastic Rock Fragment

Pink Granite

Phaneritic Acidic Igneous Rock (Rich in K-feldspar)

Blue-gray mineral/rock fragment

Indeterminate; possibly azurite-bearing material, blue chalcedony, or dyed/coated stone

Dark mineral-rich rock fragment

Indeterminate; possibly dark quartzite, chert, or weathered igneous rock

Breccia

Breccia (Sedimentary Clastic Rock)

Granite (with Orthoclase and Quartz)

Phaneritic Felsic Igneous Rock (KAlSi3O8 + SiO2)

Chalcedony (Common Agate)

Cryptocrystalline Quartz (SiO2)

Basalt

Basalt (composition predominately plagioclase feldspar and pyroxene)

Basalt River Stone

Basalt (Mafic volcanic rock, primarily Plagioclase and Pyroxene)