Metamorphic Rock (Composed Of Multiple Minerals)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

River Quartzite (or Quartz Cobble)

Quartzite (primarily Silicon Dioxide - SiO2)

Sandstone

Arenite (SiO2 based)

Vesicular Basalt with Xenocrysts

Mafic Igneous Plutonic/Extrusive Complex

Rough Emerald/Green Beryl

Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium

Amygdaloidal Basalt

Basalt with secondary amygdule minerals (likely Epidote or Chlorite)

Yellow Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Green Aventurine

Quartz variety (SiO2 with inclusions)

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartzite

Quartzite (primarily SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Sandstone (Ferruginous)

Arenite with Iron Oxides

Quartz (Milky Quartz)

Quartz (SiO2 - Silicon Dioxide)

Quartzite with Garnet

Garnetiferous Quartzite (SiO2 + X3Y2(SiO4)3)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Marble

Recrystallized Calcite Rock (CaCO3)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Plagioclase Feldspar (specifically Albite/Oligoclase)

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

Jadeite (Jade)

NaAlSi2O6 (Sodium Aluminum Silicate)

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Milky Quartz

Silicon Dioxide (SiO2)

Tiger's Eye (specifically Blue/Golden mixed or Hawk's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium aluminum silicate)

Pyrite

Pyrite (FeS2)

Quartzite River Rock with Dendrites

Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions

Green Aventurine

Quartz (Aventurine variety) - SiO₂ with Fuchsite inclusions

Olivine Basalt

Mafic Volcanic Rock (rich in (Mg, Fe)2SiO4)

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Limonite with Opal infusion

FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)

Quartz (Milky/Common)

Quartz (Silicon Dioxide, SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt with Secondary Infilling (e.g., Agate, Quartz, or Zeolite)

Diorite (River Cobble)

Intermediate plutonic igneous rock

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

River Cobble (Basaltic/Andesitic)

Mafic Igneous Porphyritic Rock

Gold Ore

Native Gold (Au) in Matrix