Milky Quartz
Quartz (SiO2)
Mineral
Category
Mineral, Often Found In Sedimentary Deposits
Browse mineral, often found in sedimentary deposits specimens identified by the Rock Identifier community.
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Jasper
Silicon dioxide (SiO2)
Mineral / Sedimentary
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Breccia
Sedimentary Breccia
sedimentary
Yellow Ochre / Limonite
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Jasper
Silicon dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Limonite with Pyrite
Hydrated Iron Oxide Hydroxide, FeO(OH)·nH2O
mineral
Banded Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Onyx
Chalcedony (SiO2)
mineral
Barite
Barium Sulfate (BaSO4)
mineral
Limestone or Tufa
Calcium Carbonate (CaCO3)
sedimentary
Yellow Agate Bottle
Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Jasper Pendant
Silicon dioxide (SiO2) with impurities
Mineral/Sedimentary
Rough Amber (likely Copal or immature Amber)
Organic gemstone / Succinite (if Baltic)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Fluorite Bracelet
Calcium Fluoride (CaF2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Amethyst and Agate Geode Section
Silicon Dioxide (SiO2) - Crystalline Quartz and Chalcedony
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Glauconite
Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2
mineral
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Druzy Quartz (on Chalcedony/Agate base)
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Selentite
Gypsum (CaSO4·2H2O)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Red and White Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineral
Agate Bookend / Quartz Geode
Silicon Dioxide (SiO2)
mineral
Native Copper (Penny specimen)
Native Copper (Cu)
mineral
Jasper / Chert (polished)
Microcrystalline Quartz (SiO2)
sedimentary / mineral
Hematite
Iron (III) oxide (Fe2O3)
mineral
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)
sedimentary
Raw Diamond (Rough Uncut)
Diamond (C - pure carbon)
mineral
Limonite Concretion (Ironstone)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite
sedimentary
Chert
Microcrystalline or cryptocrystalline quartz
sedimentary