Marble

Crushed Limestone Aggregate

Limestone (Calcium Carbonate, CaCO3)

Limestone

Calcium carbonate (CaCO3)

Fossiliferous Limestone (Gritstone/Marl)

CaCO3 (Calcium Carbonate) with Fossil Inclusions

Glauconitic Sandstone

Glauconitic Quartz-Wacke / Sandstone (Fe(II),Fe(III),Al,Mg)2-3(Si,Al)4O10(OH)2

Glauconitic Sandstone

Glauconitic arenite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2

Basalt

Basalt (Mafic volcanic rock)

Ammonite Fossil in Limestone Matrix

Ammonoidea (subclass) in Calcium Carbonate (CaCO3)

Peridotite

Peridotite (Ultramafic Rock)

Serpentine (Serpentinite)

Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)

Fossiliferous Limestone

Calcareous biomicrite / Bioclastic limestone

Fossiliferous Limestone

Fossiliferous Limestone

Peridotite (Dunite)

Peridotite (mostly Olivine: (Mg,Fe)2SiO4)

Olivine (Peridot when gem-quality)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Limestone Pebble

Sedimentary Calcium Carbonate (CaCO3)

Trilobite Fossil (Flexicalymene)

Flexicalymene ouzregui

Quartzite Pebble

Quartzite (principally SiO2)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Limestone

Calcareous sedimentary rock (primarily CaCO3)

Glauconitic Sandstone

Glauconitic Quartz Arenite

Olivine Peridotite

Peridotite (comprising Olivine (Mg,Fe)2SiO4 and Pyroxene)

Olivine (Peridotite)

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

Limestone

Calcite (CaCO3)

Glauconitic Sandstone

Glauconitic Quartz Arenite

Fossiliferous Sedimentary Rock (Coquina/Limestone)

Fossiliferous Calcarenite / Bioclastic Limestone

Olivine (Peridotite/Dunite)

Olivine (Mg,Fe)2SiO4 within Peridotite

Turritella Agate

Silicified Elimia tenera Fossil (SiO2)

Travertine

Calcareous Tufa (CaCO3)

Glauconitic Sandstone (Greensand)

Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2

Olivine Basalt

Mafic Volcanic Rock (rich in (Mg, Fe)2SiO4)

Olivine (Peridot)

Magnesium Iron Silicate ((Mg, Fe)2SiO4)

Olivine (Peridotite)

Magnesium iron silicate (Mg, Fe)2SiO4

Fossiliferous Limestone

Biogenic Calcium Carbonate (CaCO3)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Basalt with Peridotite (Olivine) Xenolith

Olivine-rich Peridotite (Dunite) xenolith in Vesicular Basalt; chemical formula (Mg,Fe)2SiO4

Chert (Fossiliferous)

Silicon Dioxide (SiO2)

Fossiliferous Chert (Chert with Crinoid Stem Impression)

Chert (SiO2) with fossil Anthozoan or Crinoid columnals

Sandstone (Greywacke)

Arenite / Clastic Sedimentary Rock

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (containing Glauconite, (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)

Turritella Agate (Fossiliferous Chert)

Silicified Elimia tenera (Fossiliferous Chalcedony)