Mineral Like (Anthropogenic)

Malachite Coating on Host Rock

Malachite [Cu2CO3(OH)2]

Jasper

Silicon dioxide (SiO2)

Ferruginous Sandstone

Sandstone (rich in iron oxides/hydroxides)

Snowflake Obsidian

Volcanic glass containing Spherulite inclusions (primarily Cristobalite, SiO2)

Breccia

Breccia - Clastic sedimentary rock

Septarian Nodule

Septarian concretion (Complex mixture of Siderite/Limestone, Calcite, and Aragonite)

Sandstone (likely Quartzose Sandstone with mineral staining)

Arenite (composed mainly of SiO2)

Shale

Mudstone/Shale

Chert (Flint)

Microcrystalline Quartz (SiO2)

Hematite (Iron Ore)

Hematite (Fe2O3)

Brown Quartz (Jasper or Chert)

Silicon Dioxide (SiO2)

Sandstone (with potential Concretion or Fossil fragment)

Arenite (primarily SiO2)

Coral Fossil (Scleractinia)

Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)

Amethyst

Silicon dioxide (SiO2) with iron impurities

Scoria (Vesicular Basalt)

Scoria (Extrusive Igneous Rock)

Quartz (Drusy/Crystalline)

Silicon Dioxide (SiO2)

Moss Agate

Moss Agate (a variety of Chalcedony, SiO ₂)

Veined Limestone (Micrite) with Quartz/Calcite Veins

Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions

Diorite

Diorite (Intermediate intrusive igneous rock)

Granite

Granite (phaneritic intrusive felsic igneous rock)

Banded Iron Formation (BIF)

Banded Iron Formation (principally Hematite/Magnetite and Chert)

Granite

Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Gneiss

Foliated Metamorphic Gneiss

Granite

Granite (Phaneritic Quartz-Feldspar Igneous Rock)

Diorite (Salt and Pepper Rock)

Phaneritic plutonic igneous rock (sodium-rich plagioclase feldspar and hornblende)

Quartzite

Quartzite (primarily SiO2)

Amygdaloidal Basalt

Amygdaloidal Mafic Volcanic Rock

Chrysocolla

Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O

Dalmation Jasper (or Dalmation Stone)

Dalmation Stone (composed of Perthite, Quartz, and Arfvedsonite)

Green Jasper (Agate-Jasper mixture)

Silicon Dioxide (SiO2) with impurities

Greenstone (Greenstone River Pebble)

Greenschist (metamorphosed mafic igneous rock)

Vesicular Basalt with Epidote

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

Chert Pebble (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Sandstone

Arenite (SiO2 based)

Sandstone

Arenite (SiO2 based)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Desert Rose

Gypsum (variety Selenite) or Barite, CaSO4·2H2O

Sandstone (with Siltstone/Greywacke variations)

Sedimentary Rock (Clastic)

Hematite

Iron(III) oxide (Fe2O3)

Chiastolite (Andalusite)

Al2SiO5

Granite / Gneiss Complex

Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)