Mineral Like Biological Tissue

Garnet

Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3

Fossilized Bivalve Shell

Bivalvia (fossil specimen)

Sandstone

Arenite

Sandstone Pebble

Arenite (primarily SiO2)

Moss Agate

Silicon Dioxide with inclusions (SiO2)

Sandstone (Quartzite-rich Pebble)

Arenite (primarily SiO2)

Sandstone (Quartzose Sandstone)

Arenite

Red Sandstone Pebble

Arenite (primarily Quartz SiO2 with Hematite Fe2O3 staining)

Barite (Desert Rose or Cockscomb variety)

Barium Sulfate (BaSO4)

Sandstone

Arenite (primarily SiO2)

Amazonite

K(AlSi3O8), Microcline

Clear Quartz

Silicon Dioxide (SiO2)

Specular Hematite with Quartz and Limonite

Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)

Rough Quartz (Grey-Green)

Silicon Dioxide (SiO2)

Quartz Pebble (Chalcedony/Agate)

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Brown Agate

Silicon Dioxide (SiO2)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Limonitic Sandstone (Stained Sandstone)

Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining

Amber

Succinite (Carbon-based organic compound; approximate formula C10H16O)

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Blue Calcite

Calcium Carbonate (CaCO3)

Pyrite

Iron Sulfide (FeS2)

Dalmatian Stone (Dalmatian Jasper)

Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite

Pyrite

Iron Sulfide (FeS2)

Yellow Aventurine

Quartz (SiO2) with iron-bearing inclusions

Sandstone (with Iron Siderite Concretion)

Arenite with Ironstone Concretion (FeCO3)

Malachite

Malachite (Copper Carbonate Hydroxide, Cu2CO3(OH)2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Pegmatite (with smoky quartz and tourmaline/biotite)

Pegmatitic Granite

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Beads (likely glass or man-made material)

N/A (artificial material)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Variant)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz Cluster

Quartz (Silicon Dioxide - SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide - SiO2)