Sedimentary (Secondary Classification For A Weathered Mineral Specimen)

Chert (Jasper/Mudstone variant)

Silicon Dioxide (SiO2)

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock including secondary mineral infills)

Sandstone with Iron Concretion

Arenite with Limonite/Goethite Concretion

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Yellow Chert or Jasper

Silicon Dioxide (SiO2)

Jasper (Iron-stained)

Silicon Dioxide (SiO2) with iron oxide inclusions

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)

Sandstone (Quartz Sandstone)

Clastic sedimentary rock (primarily SiO2)

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

General Gravel (River Rock/River Stones)

Mixed Lithic Sediments (Conglomerate Clasts)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Quartz Geode Pebble

Silicon Dioxide (SiO2)

Honey Calcite

Calcium Carbonate (CaCO3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

River Cobbles (Basalt, Quartzite, and Sandstone mix)

Fluvial detritus (primarily SiO2, Plagioclase, and Pyroxene mix)

Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Clear Quartz

Silicon Dioxide (SiO2)

Pyromorphite on Epidote

Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]

Wishing Stone with Quartz Vein

Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)

Sandstone (Quartzite Pebble)

Arenite / Metamorphosed Sandstone (SiO2)

Quartz (Iron-stained or Rose variant)

Silicon Dioxide (SiO2)

Blue Chalcedony

Silicon Dioxide (SiO2)

Carnelian

Carnelian (SiO2 - Silicon Dioxide)

Orange Calcite

Calcium Carbonate (CaCO3)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)

Quartzite Pebble (with iron staining)

Quartzite (SiO2 with ferric oxide impurities)

Satin Spar (often marketed as Selenite)

Fibrous Gypsum (CaSO4·2H2O)

Fluorite

Calcium Fluoride (CaF2)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-feldspar, Quartz, and Biotite)

Specular Hematite (Specularite) in Matrix

Specularite (Fe2O3)

Quartz Pebble

Silicon dioxide (SiO2)

Citrine Geode

Citrine (Silicon Dioxide, SiO2)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Jasper with Agate Inclusions

Silicon Dioxide (SiO2) - variety of Quartz/Chert

Green Common Opal

Hydrated Silica (SiO2·nH2O)

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Clear Quartz Cluster

Quartz (Silicon Dioxide - SiO2)

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chalcedony (Botryoidal or Tumbled)

Chalcedony (SiO₂)

Banded Calcite (often sold as Caribbean Calcite or Honey Calcite)

Calcium Carbonate (CaCO3)