All rocks & minerals

Graphic Granite (or Rapakivi-textured Granite)

Alkali feldspar granite

Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions

Quartz

Silicon Dioxide (SiO2)

Jasper

Microcrystalline Quartz (SiO2)

Unakite

Altered Granite (Epidote-bearing Granitic Rock)

Quartzite

Quartzite (Metamorphosed quartz sandstone)

Vesicular Basalt with Feldspar Phenocrysts

Porphyritic Basalt

Quartz Pebble

Silicon Dioxide (SiO2)

Rose Quartz

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

Greenstone

Metabasalt / Metavolcanic rock

Amethyst

Quartz (SiO2)

Agate

Silicon Dioxide (Chalcedony), SiO2

Carnelian

Silicon Dioxide (Chalcedony variety), SiO2

Larimar

Pectolite (Ca2NaSi3O8(OH))

Mosasaur Tooth Fossil

Mosasaurus sp.

White Quartz Egg

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Fossilized Bone

Permineralized Vertebrate Bone

Quartz

Silicon Dioxide (SiO2)

Unknown Rock Fragment

Unknown

Diamond

Carbon (C)

Pumice

Pumice (Volcanic glass / Felsic igneous rock)

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Sandstone

Sedimentary rock containing invertebrate fossils

Fossil Coral

Hexagonaria or Rugose coral fossil (replaced by silica/chalcedony)

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Conglomerate

Conglomerate rock

Granite

Intrusive Igneous Rock

Fossilized Coral

Rugosa / Scleractinia (Agatized or Calcitized Coral)

Tumbled Stone

Silicon dioxide / Various silicates

Pumice

Pumice (volcanic glass foam)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Granite

Intrusive Igneous Rock

Quartz Pebbles

Silicon Dioxide (SiO2)

Petoskey Stone

Favosites alpenensis

Jasper with Quartz Vein

Microcrystalline Quartz (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Granite

Felsic intrusive igneous rock

Quartz

Silicon Dioxide (SiO2)

Sandstone

Sedimentary Rock (Quartz Arenite)

Granite

Intrusive Igneous Rock