Rock Identifier

Category

Sedimentary To Metamorphic

Browse sedimentary to metamorphic specimens identified by the Rock Identifier community.

Learn about Sedimentary To Metamorphic in the encyclopedia

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Metabasalt

Eulysite

Breccia

Ironstone

Anthracite

Metaquartzite

Slate

Marble

Hornfels

Metarhyolite

Amethyst and Calcite collection (Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)) — mineral

Amethyst and Calcite collection

Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)

Pyrite (Fool's Gold) (Iron Pyrite (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Pyrite (FeS2)

Zoisite with Ruby (Anyolite) (Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)) — metamorphic

Zoisite with Ruby (Anyolite)

Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)

Small brown mineral fragment (Unidentified; the image lacks enough detail for a reliable species-level identification) — mineral

Small brown mineral fragment

Unidentified; the image lacks enough detail for a reliable species-level identification

Limonite or Goethite (Ironstone) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite or Goethite (Ironstone)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Mossy Rock (Mixed lithology rock with Bryophyta (moss)) — sedimentary

Mossy Rock

Mixed lithology rock with Bryophyta (moss)

Limonite (Iron Ore) (FeO(OH)·nH2O (Hydrous ferric oxide)) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Pearl necklace (Pearl, primarily aragonite (CaCO₃) and conchiolin) — gemstone

Pearl necklace

Pearl, primarily aragonite (CaCO₃) and conchiolin

Gravel (Crushed Stone Aggregates) (Mixed Siliciclastic / Carbonate Aggregate) — sedimentary

Gravel (Crushed Stone Aggregates)

Mixed Siliciclastic / Carbonate Aggregate

Mixed Tumbled Rocks and Minerals Collection (Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)) — mineral

Mixed Tumbled Rocks and Minerals Collection

Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)

Carnelian (SiO2 (Silicon Dioxide with Iron Oxide impurities)) — gemstone

Carnelian

SiO2 (Silicon Dioxide with Iron Oxide impurities)

Pyrite in Quartzite/Graphite Matrix (Iron Sulfide (FeS2)) — Mineral

Pyrite in Quartzite/Graphite Matrix

Iron Sulfide (FeS2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

White quartz bead strand (Quartz, silicon dioxide (SiO₂), likely milky or translucent quartz; beads are polished and drilled) — mineral

White quartz bead strand

Quartz, silicon dioxide (SiO₂), likely milky or translucent quartz; beads are polished and drilled

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Chalcedony (Tumbled Pebble) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Tumbled Pebble)

Silicon Dioxide (SiO2)

Yellow Aventurine (Silicon Dioxide with inclusions (SiO2 + Muscovite/Fuchsite)) — mineral

Yellow Aventurine

Silicon Dioxide with inclusions (SiO2 + Muscovite/Fuchsite)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

White Agate / Chalcedony (Silicon Dioxide (SiO2)) — gemstone

White Agate / Chalcedony

Silicon Dioxide (SiO2)

Unidentified gray-brown stone (Likely fine-grained quartz–feldspar rock; exact identification is not possible from this close, blurred image) — mineral

Unidentified gray-brown stone

Likely fine-grained quartz–feldspar rock; exact identification is not possible from this close, blurred image

Unidentifiable Rock Fragment — Uncertain

Unidentifiable Rock Fragment

Tiger's Eye (Silicon dioxide (SiO2) - Pseudomorph after crocidolite) — mineral

Tiger's Eye

Silicon dioxide (SiO2) - Pseudomorph after crocidolite

Pyrite-bearing rock (likely pyrite-rich ore) (Pyrite, FeS₂, in a fine-grained host rock) — mineral

Pyrite-bearing rock (likely pyrite-rich ore)

Pyrite, FeS₂, in a fine-grained host rock

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Mixed mineral and rock collection (Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones) — mineral

Mixed mineral and rock collection

Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones

Chalcedony (Agate) Pebble (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate) Pebble

Silicon Dioxide (SiO2)

Green Aventurine (Silicon dioxide (SiO2) with fuchsite inclusions) — mineral

Green Aventurine

Silicon dioxide (SiO2) with fuchsite inclusions

Quartz Vein in Pelite (Metamorphic Rock) (Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)) — metamorphic

Quartz Vein in Pelite (Metamorphic Rock)

Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)

Faceted clear gemstone, likely glass or cubic zirconia (Undetermined; could be synthetic cubic zirconia (ZrO₂) or cut glass (silica-based)) — gemstone

Faceted clear gemstone, likely glass or cubic zirconia

Undetermined; could be synthetic cubic zirconia (ZrO₂) or cut glass (silica-based)

Rounded quartz-rich cobble (Likely quartzite or quartz-rich sandstone; exact identification requires a fresh break or hardness test) — sedimentary

Rounded quartz-rich cobble

Likely quartzite or quartz-rich sandstone; exact identification requires a fresh break or hardness test

Light-colored pebble, likely quartzite or weathered limestone (Indeterminate from image; possible quartzite (microcrystalline SiO₂)) — metamorphic

Light-colored pebble, likely quartzite or weathered limestone

Indeterminate from image; possible quartzite (microcrystalline SiO₂)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Clear quartz crystals (Quartz (silicon dioxide, SiO₂)) — mineral

Clear quartz crystals

Quartz (silicon dioxide, SiO₂)

Quartz (Milky Quartz / Quartzite) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz / Quartzite)

Silicon Dioxide (SiO2)

Small red-brown mineral or rock fragment (Unidentified; possibly iron-oxide-rich jasper, garnet, or weathered sulfide) — mineral

Small red-brown mineral or rock fragment

Unidentified; possibly iron-oxide-rich jasper, garnet, or weathered sulfide

Polished hematite bead (probable) (Hematite, Fe₂O₃) — mineral

Polished hematite bead (probable)

Hematite, Fe₂O₃

Quartz (Milky / Massive Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky / Massive Quartz)

Silicon Dioxide (SiO2)

Native Silver Nugget (Silver (Ag)) — mineral

Native Silver Nugget

Silver (Ag)

Pyrite (Iron Pyrite (FeS2)) — mineral

Pyrite

Iron Pyrite (FeS2)

Tumbled hematite (likely hematite-rich ironstone) (Hematite, Fe₂O₃; possibly mixed with magnetite or goethite) — mineral

Tumbled hematite (likely hematite-rich ironstone)

Hematite, Fe₂O₃; possibly mixed with magnetite or goethite

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)