Metamorphic (Low Grade)

Zoisite with Ruby (Anyolite)

Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)

Epidote in Basalt

Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)

Almandine Garnet in Schist

Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist

Heliotrope (Bloodstone)

Cryptocrystalline Quartz (SiO2) with inclusions of Hematite (Fe2O3)

Lapis Lazuli (Low-grade/Calcite-heavy)

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)

Black Sapphire

Corundum (Al2O3)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Ironstone Concretion (Limonite/Goethite)

Iron oxide concretion (contains FeO(OH)·nH2O)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Ferruginous Concretion)

Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement

Milky Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Ferruginous Sandstone (Ironstone)

Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)

Limonite (Ironstone)

Limonite (FeO(OH)·nH2O)

Ferruginous Sandstone (Ironstone)

Sedimentary rock with Limonite/Goethite cement

Red Siltstone

Siltstone (primarily quartz and feldspar sized 0.0039 to 0.0625 mm)

Celadonite in Amygdaloidal Basalt

K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2 (Celadonite mineral) within a Basalt matrix

Prehnite

Prehnite, Ca2Al(AlSi3O10)(OH)2

Siltstone

Siltstone (primarily SiO2 with Al2O3)

Limonite Concretion (Ironstone)

Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)

Limonite Concretion (Ironstone)

Limonite / Goethite (FeO(OH)·nH2O)

Ironstone Concretion (Siderite Nodules)

Siderite (FeCO3) in Mudstone or Sandstone matrix

Ferruginous Sandstone

Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)

Milky Quartz with Dendritic Inclusions

Silicon Dioxide (SiO2)

Siltstone

Siltstone

Limonite Sandstone

Ferruginous Sandstone (Hydrated Iron Oxide)

Blue Cracked Quartz (Dyed Fire Crackle Quartz)

Silicon Dioxide (SiO2) with synthetic dye

Sandstone (Quartzite-rich)

Clastic sedimentary rock (primarily SiO2)

Limonitic Gossan

Goethite/Limonite aggregate after sulfide

Emerald

Beryl (Be₃Al₂Si₆O₁₈), specifically the green variety colored by trace amounts of chromium or vanadium.

Muscovite Schist

Mica Schist (KAl2(AlSi3O10)(OH)2)

Corundum

Corundum (Al2O3)

Prehnite

Prehnite, Ca2Al2Si3O10(OH)2

Vesicular Basalt (Aqueous Tumbled)

Scoriaceous Basalt

Sandstone (likely Quartzite-grade)

Arenite (primarily SiO2)

Red Jasper (Chert)

Silicon dioxide (SiO2) with iron oxide inclusions

Jasper (Red/Brown Variety)

Jasper (Microcrystalline Quartz, SiO2)

Basalt with Epidote Veins

Mafic Igneous Rock (Basalt)

Jade

There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.

Turquoise

Hydrated phosphate of copper and aluminum - CuAl6(PO4)4(OH)8·4H2O

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]