Man Made Object (Ring)

Sandstone (Red Sandstone / River Stone)

Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)

Fluorite (likely Fluorite on Quartz/Matrix)

Calcium Fluoride (CaF2)

Sandstone (Beach Pebble)

Clastic sedimentary rock (primarily Quartz and Feldspar)

Potassium Feldspar and Quartz

KAlSi3O8 (Potassium Feldspar) and SiO2 (Quartz)

Rainbow Fluorite

Calcium Fluoride (CaF2)

Fluorite

Fluorite (Calcium Fluoride - CaF2)

Red Hematite

Iron(III) oxide (Fe2O3)

Limestone

Calcium carbonate (CaCO3)

Fluorite

Fluoride (Calcium Fluoride - CaF2)

Red Jasper (Quartzite conglomerate)

Silicon dioxide (SiO2) with Iron inclusions

Limonite

Limonite (FeOO·nH2O)

Rose Quartz

Rose Quartz (Silicon Dioxide, SiO2)

Limestone (specifically Tufa or Travertine)

Calcium Carbonate (CaCO3)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, or Chrysotile)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Diabase (Greenstone)

Diabase or Dolerite

Fluorite

Calcium Fluoride (CaF2)

Porphyritic Basalt (Chinese Flower Stone / Chrysanthemum Stone basalt variety)

Porphyritic Basalt containing Plagioclase Feldspar phenocrysts

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Sandstone (Ferruginous)

Arenite (Fe-rich)

Sandstone

Arenite (primarily SiO2)

White Marble

Recrystallized Calcite (CaCO3)

Turquoise, Pearl, and Coral Necklace

CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)

Rose Quartz

Silicon dioxide (SiO2)

Chert / Jasper

Silicon Dioxide (SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Ferruginous Sandstone

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Granite

Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)

Quartzite

Quartzite (Primary mineral: SiO2)

Basalt (River Cobble)

Basalt (Mafic volcanic rock)

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

Dendritic Quartz

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Quartzite with Iron Inclusions

Quartzite (primarily SiO2 with Fe2O3 impurities)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Orange Calcite

Calcium Carbonate (CaCO3)

Banded Agate (specifically Sardonyx)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Red Jasper

Jasper (Silicon Dioxide with iron oxide inclusions), SiO2

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (Lithic Sandstone)

Quartz Crystal Point

Silicon Dioxide (SiO2)