Mineral (Silicate Variety)

Agate

Silicon Dioxide (SiO2) - Banded Chalcedony

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Desert Rose

Baryte or Gypsum (Selenite) with Sand Inclusions (BaSO4 or CaSO4·2H2O)

Yellow Jasper

Silicon Dioxide (SiO2) with iron impurities

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Calcium Carbonate (CaCO3)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Gypsum (Satin Spar variety)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Epidote (with Quartz and Feldspar)

Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)

Quartz

Quartz (Silicon Dioxide, SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese

Yellow Calcite

Calcium Carbonate (CaCO3)

Green Calcite

Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Quartz

Quartz (SiO₂)

Milky Quartz

Silicon Dioxide (SiO2)

Peach Selenite (Satin Spar)

Gypsum (CaSO4·2H2O)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Apatite

Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))

Milky Quartz (Tumbled)

Quartz (Silicon Dioxide, SiO2)

Dalmatian Jasper

Dalmatian Stone (Arfvedsonite/Albite Microquartz)

Selenite (variety of Gypsum)

Calcium sulfate dihydrate (CaSO4·2H2O)

Carnelian

Carnelian (SiO2 - Silicon Dioxide with Iron Oxide impurities)

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)

Quartz (SiO₂)

Ruby in Zoisite (Anyolite)

Corundum var. Ruby in Zoisite (Al2O3 + (Ca2Al3(SiO4)3(OH)))

Jasper (likely Ocean Jasper or Variegated Jasper)

Silicon Dioxide (SiO2) with impurities

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2)

Chalcedony (River Pebble)

Silicon Dioxide (SiO2)

Yellow Chalcedony

Silicon Dioxide (SiO2)

Chalcedony (Botryoidal or Agate nodule)

Silicon Dioxide (SiO2)

Blue Lace Agate

Silicon Dioxide (SiO₂)

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide impurities

Aventurine (likely Green Aventurine)

Quartz (SiO2) with included minerals (Fuchsite or Chlorite for green color)

Milky Quartz

Quartz (SiO2)

Concrete with Aggregate

Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)