Metamorphic Rock (Variety Of Quartz)

Amethyst

Silicon Dioxide with Iron impurities (SiO2)

Sandstone (Ferruginous)

Sandstone (mainly SiO2 with Fe2O3 staining)

Banded Agate (Onyx variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Tree Agate (Dendritic Agate/Quartz)

Silicon Dioxide (SiO2) with trace Manganese or Iron oxide inclusions

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Citrine Geode Fragment

Citrine (Silicon Dioxide with Iron Impurities), SiO2

Quartzite (or Ferruginous Quartzite)

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 impurities)

River Rock (likely Quartzite or Quartz-rich Siltstone)

Quartzite (SiO2)

Yellow Quartzite River Cobble

Meta-quartzite (SiO2 with iron oxide staining)

Slate

Foliated Metamorphic Rock (primarily composed of Muscovite, Chlorite, and Quartz)

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi₃O₈)

Mica Schist

Muscovite/Biotite Schist

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Granite

Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Quartzite

Quartzite

Smoky Quartz in Matrix

Silicon dioxide (SiO2) within Pegmatite/Gneiss

Green Aventurine

Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

Banded Jasper (Chert)

Silicon Dioxide (SiO2) - variety of Chalcedony

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Garnet (Almandine)

Almandine, Fe3Al2Si3O12

Jade

Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.

Gold Ore in Matrix

Native Gold (Au) in Quartz/Limonite host rock

Greisen

Greisen

Quartzite

Quartzite (Primary mineral: Silicon Dioxide, SiO₂)

Chert

Siliceous sedimentary rock (predominantly microcrystalline quartz, SiO2)

Chalcedony (variations like Agate or Jasper)

Chalcedony (SiO₂ - microcrystalline quartz)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Mica Schist

Mica Schist (primarily composed of Muscovite, Biotite, and Quartz)

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Conglomerate (Red Sandstone variety)

Clastic Sedimentary Rock (Conglomeratic Sandstone)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Chert (specifically Yellow or River Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Graphite-veined Quartzite

Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)

Chert (and/or Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Banded Gneiss

Gneiss (pronounced "nice")