Mineral Health

Shale with Iron Staining

Fissile Argillaceous Sedimentary Rock

Sandstone (Ferruginous)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)

Turquoise

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

Sandstone

Arenite (composed primarily of SiO2)

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)

Ferruginous Sandstone

Ferruginous Quartz-Arenite

River Cobble (likely Basalt or Greenstone)

Mafic Igneous Rock (with possible chloritic alteration)

Turquoise

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

Sandstone

Arenite (mostly Quartz-based)

Red Sandstone

Arenite (primarily SiO2 with hematite/iron oxide coating)

Magnetite

Magnetite (Iron(II,III) oxide, Fe3O4)

Basalt with Epidote/Chlorite

Amygdaloidal Basalt (SiO2 with (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)))

Basalt with Calcite Veining

Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Unopened Geode

Geode (containing various mineralization like Quartz SiO2)

Larimar

Pectolite (a blue variety of Pectolite)

Turquoise

Turquoise (Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O)

Granite

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)

Banded Gneiss

Gneiss

Quartz Geode

Silicon Dioxide (SiO2)

Sandstone (Quartz Arenite)

Sandstone (SiO2 with possible mineral cements)

Rose Quartz

Quartz (Silicon Dioxide, SiO2)

Garnetiferous Quartzite (Garnet Gneiss Pebble)

Garnet-bearing Quartzite or Quartz-Feldspar Gneiss

Arfvedsonite (often mistakenly sold as Astrophyllite)

Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]

Black Onyx

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Pyrite in Quartz (Drill Core)

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Limonite with Goethite

Iron Hydroxide Mixture (FeO(OH)·nH2O)

Copper Ore (likely Malachite or Chrysocolla staining)

Copper Secondary Mineral (e.g., Cu2CO3(OH)2)

Geode (Unopened)

Silicon Dioxide (SiO2) in sedimentary host rock

Sandstone

Arenite (SiO2 principal)

Shale with Iron Oxide Staining

Fissile Mudstone (primarily clay minerals and quartz)

Quartz (Raw and Water-worn)

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Sunstone

Oligoclase (Feldspar variety)

Amethyst

Silicon dioxide with iron impurities (SiO2 + Fe3+)

Orbicular Jasper (Ocean Jasper)

Silicon Dioxide (SiO2) with various inclusions

Amazonite

Microcline (variety Amazonite), K(AlSi3O8)

Chalcopyrite

Chalcopyrite (CuFeS2)

Alexandrite

Chrysoberyl (BeAl2O4 with Chromium impurities)

Limonite Pseudomorph after Pyrite

Limonite (Hydrous iron oxides e.g., FeO(OH)·nH2O) pseudomorphing Pyrite (FeS2)