Wishing Stone (Basalt/Greywacke with Quartz Vein)
Basalt or Siltstone with SiO2 (Quartz) hydrothermal intrusion
igneous/sedimentary
Category
Igneous Or Sedimentary (Anthropogenic Modification)
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River Pebbles (Tumbled Quartz and Basalt)
Silicon Dioxide (SiO2) for white quartz; Mafic Volcanic Rock for basalt
igneous and sedimentary
River Rock (Basalt/Greywacke pebbles)
Fluvial gravel primarily composed of Mafic Volcanic Rock (Basalt) or Lithic Sandstone (Greywacke)
igneous and sedimentary
Granite
Intrusive Igneous Rock
igneous
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Granite
Granite (Plutonic Igneous Rock)
igneous
Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary component
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Quartz with Epidote
Silicon dioxide (SiO2) with Calcium aluminum iron silicate (Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))
mineral
Quartz with Mica
SiO2 (Quartz) with Potassium aluminum silicate (Muscovite)
Mineral
Granite
Granite
Igneous
Quartz
Quartz (SiO₂ - Silicon Dioxide)
mineral
Granite
Granite
igneous
Yellow Sapphire or Citrine
Al2O3 (Corundum) or SiO2 (Quartz)
mineral
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Green Aventurine and Clear Quartz
Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)
Mineral
Cloudy Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite in Quartz
Na8(Al6Si6O24)Cl2 (Sodalite) / SiO2 (Quartz)
metamorphic
Cone-in-cone structure (Limestone)
Cone-in-cone structure (Secondary Sedimentary Structure)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Granite (Plutonic Igneous Rock)
igneous
K-Feldspar Granite Fragment
Felsic Plutonic Rock (Granite)
igneous
Granite Pebble
Granite
igneous
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Granite
Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)
igneous
Dalmation Jasper (Dalmation Stone)
Perthitic feldspar-quartz-amphibole rock
igneous
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
gemstone
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Labradorite
Labradorite ((Ca,Na)(Al,Si)4O8)
mineral
Porphyritic Basalt (with Augite Crystals)
Porphyritic Mafic Volcanic Rock (Fe-Mg Silicates)
igneous
Granite
Intrusive Igneous Rock
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Basalt Pebble
Extrusive Igneous Rock
igneous
Siltstone / Slate
Siltstone / Low-grade Slate
sedimentary
Sandstone pebble
Sandstone (mainly Quartz, SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Granite-like igneous rock
Likely medium-grained granite or granodiorite; quartz–feldspar–mica aggregate
igneous