Mineralological Specimen

Likely weathered basalt with iron-oxide alteration

Basalt (fine-grained mafic volcanic rock), chiefly plagioclase and pyroxene with altered iron-bearing minerals

Uncertain—likely weathered granite or quartz-rich rock

Granite (quartz–feldspar–mica aggregate), tentative

Chert Breccia

Brecciated Chert (Microcrystalline SiO2)

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Quartz (Milky/Crystalline)

Silicon Dioxide (SiO2)

Jasper Agate

Silicon dioxide (SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Quartz geode with iron-oxide matrix

Quartz (SiO₂), likely with limonite/goethite and possibly calcite

Labradorite

Labradorite (Ca,Na)(Al,Si)4O8

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Fossiliferous Mudstone / River Pebble

Sedimentary rock with trace fossil or inclusion

Garnet in Matrix (Schist or Quartz)

Almandine Garnet, Fe3Al2(SiO4)3

Likely pink-orange calcite (rough specimen)

Calcite, calcium carbonate (CaCO₃)

Raw Topaz (or Smoky Quartz)

Al2SiO4(F,OH)2 / Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Clear Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartz

Ferruginous Quartz (Silicon Dioxide + Iron Oxide, SiO2 + Fe2O3)

Brecciated Chert with Quartz Veining

Microcrystalline Quartz (SiO2) Breccia

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Fossiliferous Chert (with Fossil Shells)

Silicon Dioxide (SiO2) with biogenic inclusions

Quartz (Druzy)

Silicon Dioxide (SiO2)

Quartz (Milky or Iron-stained)

Silicon Dioxide (SiO2)

Green Fluorite

Calcium fluoride (CaF2)

Quartz Geode

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Sandstone concretion (Ironstone-stained)

Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)

Quartz Druze on Matrix (Geode Fragment)

Quartz (Silicon Dioxide, SiO2)

Native Copper in Basalt

Cu-element in Mafic Volcanic Rock (Basalt)

Unidentified tan-gray stone

Indeterminate from the blurry image; it may be a common silicate rock such as quartzite or granite.

Agate Geode Slice (with Druzy Quartz)

Silicon Dioxide (SiO2)

Quartz Geode

Quartz (Silicon Dioxide, SiO2) Geode

Citrine (Heat-treated Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Milky Quartz Pebble (Iron-Stained)

Silicon Dioxide (SiO2)

Quartz-rich gold-bearing rock (possible quartz vein ore)

Hydrothermal quartz vein; predominantly SiO₂, with possible iron oxides/sulfides and minor native gold

Quartz vein / massive quartz

Quartz (SiO₂), likely milky quartz with iron-oxide and possibly chlorite inclusions

Ironstone / limonitic iron-rich rock

Goethite–hematite–limonite aggregate, commonly an ironstone concretion

Small quartz crystal cluster (likely druzy quartz)

Quartz, silicon dioxide (SiO₂)

Weathered quartz-rich rock, possibly quartzite or silicified sandstone

Quartz-dominant aggregate; likely microcrystalline quartz (SiO₂), but exact identification requires testing

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Quartz with Celadonite Inclusion

Silicon Dioxide (SiO2) with green clay mineral inclusions

Sunstone

Plagioclase Feldspar (containing (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions)

Jasper with Agate and Quartz Inclusions

Silicon Dioxide (SiO2) - Chalcedony / Quartz aggregate