Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)

Agate (Lace Agate Geode Slice)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with Ferric Hydroxide impurities

Quartzite (Yellow/Orange variety)

Quartzite (primarily SiO2)

Basalt

Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 with (Ca,Na)(Al,Si)4O8

Quartz Geode

Silicon dioxide (SiO2)

Chert (Flint Nodules)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossilized Bone Fragment

Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)

Granite

Granite (Mainly Quartz SiO2, K-Feldspar KAlSi3O8, and Plagioclase)

Milky Quartz with Mineral Inclusions

Quartz (Silicon Dioxide, SiO2)

Red Hematite

Iron(III) Oxide (Fe2O3)

Granodiorite (foreground) and Rose Quartz (background)

Granodiorite / Quartz (SiO2)

Gneiss (Metamorphic Rock)

Gneiss

Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)

Granite

Granite (Felsic Intrusive Igneous Rock)

Rough Gemstone Grains (Mixed Sapphires and Quartz)

Corundum (Al2O3) and Quartz (SiO2)

Gneiss

Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Lepidolite with Quartz

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Mica (Muscovite)

Potassium aluminum silicate - KAl2(AlSi3O10)(OH)2

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Agate

Silicon Dioxide (SiO2) - Chalcedony variant

Red Sandstone

Arenite (Ferruginous Sandstone)

Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)

Epidote with Black Hornblende and White Quartz mixture

Picture Jasper

Silicon dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace titanium, iron, or manganese

Milky Quartz

Silicon Dioxide (SiO2)

Dyed Agate Geode (Pink/Magenta)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Hypersthene

Hypersthene (Enstatite variety), (Mg,Fe)SiO3

Diorite

Phaneritic intermediate plutonic rock

Basalt

Basalt (primarily composed of Plagioclase Feldspar and Pyroxene)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Labradorite

(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)

Quartz (likely a clear or rock crystal variety)

Quartz (SiO2 - Silicon Dioxide)

Chlorite Included Quartz

Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Li)6AlSi3O10(OH)8

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Banded Agate (Polished Slice)

Chalcedony (cryptocrystalline Quartz), SiO2

Diorite (Salt and Pepper Rock)

Diorite (comprising Plagioclase Feldspar, Hornblende, and Biotite)

Apricot Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Granite (Specimen: Logan Rock)

Phaneritic plutonic igneous rock (mainly Quartz, Feldspar, and Mica)

Scoria

Vesicular Basalt / Scoria (Mafic silicate rock)