Amorphous Solid

Porphyritic Rhyolite

Porphyritic Rhyolite (compositionally similar to granite)

Vesicular Basalt with Epidote

Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Granite with Orthoclase and Hematite Staining

Phaneritic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

Green Jasper

Jasper (Silicon Dioxide, SiO2)

Basalt with Scoria/Vesicular texture

Vesicular Basalt (primarily Plagioclase feldspar, Pyroxene, and Olivine)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Moss Agate

Agate (Silicon Dioxide, SiO2) with dendritic inclusions

Yellow Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Amygdaloidal Basalt

Amygdaloidal Basalt (containing secondary minerals like Quartz, Zeolites, or Calcite)

Jasper

Silicon Dioxide (SiO2)

Moonstone

Feldspar (Orthoclase with Albite), (K,Na)AlSi3O8

Lava Rock (Scoria)

Scoria (Vesicular Basalt)

Lava Rock (Basalt)

Basalt (extrusive igneous rock)

Scoria (Vesicular Basalt)

Vesicular Basalt

Porphyritic Rhyolite (Red Porphyry)

Porphyritic Rhyolite (Felsic volcanic rock)

Flower Agate

Chalcedony (Silicon Dioxide, SiO2) with Opaque Spherulitic Inclusions

Vesicular Basalt (Scoria)

Extrusive Mafic Volcanic Rock (FeO-SiO2-MgO)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Basalt with Vesicular Texture (Beach Cobble)

Vesicular Basalt (Aphanitic Igneous Rock)

Pumice

Vesicular volcanic glass

Amygdaloidal Basalt

Amygdaloidal Basalt (extrusive volcanic rock with mineral inclusions)

Red Jasper

Jasper (Silica/Microcrystalline Quartz with Hematite inclusions), SiO2

Yellow Citrine Quartz

Silicon Dioxide (SiO₂)

Banded Calcite (often marketed as Mexican Onyx or Onyx Marble)

Calcite (Calcium Carbonate, CaCO3)

Peacock Ore (Chalcopyrite)

Chalcopyrite (CuFeS2)

Yellow Quartz (Citrine or Quartzite Pebble)

Silicon Dioxide (SiO2)

Amethyst (Geode)

Silicon Dioxide with Iron impurities (SiO2)

White Howlite

Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Yellow Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Vesicular Basalt with Secondary Mineral Infill

Mafic Volcanic Rock (Basalt)

Glauconitic Sandstone

Glauconitic Quartz Arenite

Basalt (Water-worn Pebble)

Basalt (Aphanitic Mafic Igneous Rock)

Basalt (River Stone/Pebble)

Basalt (Extrusive Igneous Rock)

Jasper and Basalt Mix (Dark Chert/Basalt River Pebble)

Silicon Dioxide (SiO2) or Mafic extrusive igneous rock

Sandstone

Arenite (predominantly Quartz Sandstone)

Quartz (Common Milky Quartz Pebble)

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

River Stone (Quartzite/Siltstone mixture)

Silicon Dioxide (SiO2) based metamorphosed sandstone