Rock Identifier

Category

Mineral Like (Anthropogenic)

Browse mineral like (anthropogenic) specimens identified by the Rock Identifier community.

Learn about Mineral Like (Anthropogenic) in the encyclopedia

Calc-Silicate Rock

Calc-Silicate Rock

Garden Quartz

Ribbon Jasper

Sagenite Agate

Leopard Skin Jasper

Leopard Skin Jasper

Flower Jasper

Feather Jasper

Dendritic Opal

Starburst Agate

Plume Agate

Feather Agate

Moss Opal

Chalcedony (specifically Agate or Moonstone-like Quartz) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (specifically Agate or Moonstone-like Quartz)

Silicon Dioxide (SiO2)

Garden Quartz (Included Quartz (SiO2 with accessory minerals such as Chlorite, Hematite, or Feldspar)) — mineral

Garden Quartz

Included Quartz (SiO2 with accessory minerals such as Chlorite, Hematite, or Feldspar)

Smoky Quartz (Smoky Quartz (Silicon Dioxide - SiO2)) — mineral

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Desert Rose (Baryte or Gypsum (Selenite) with Sand Inclusions (BaSO4 or CaSO4·2H2O)) — mineral

Desert Rose

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

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Olivine (Peridotite / Dunite Pebble) ((Mg,Fe)2SiO4 (Magnesium Iron Silicate)) — mineral

Olivine (Peridotite / Dunite Pebble)

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

Moss Agate (Silicon Dioxide (SiO2) with inclusions) — mineral

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Banded Agate (Geode Fragment) (Silicon Dioxide (SiO2) - Variety Agate) — mineral

Banded Agate (Geode Fragment)

Silicon Dioxide (SiO2) - Variety Agate

Amethyst (Tumbled) (Amethyst (Silicon Dioxide, SiO2 + Fe4+)) — mineral

Amethyst (Tumbled)

Amethyst (Silicon Dioxide, SiO2 + Fe4+)

Agate (Agatized Chalcedony (SiO2)) — mineral

Agate

Agatized Chalcedony (SiO2)

Olivine (Peridot) (Magnesium Iron Silicate (Mg, Fe)2SiO4) — mineral

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Blue Chalcedony (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Smoky Quartz (SiO2 (Silicon Dioxide)) — mineral

Smoky Quartz

SiO2 (Silicon Dioxide)

Chalcedony (Common Opal variant) (Silicon dioxide (SiO2) with varying levels of hydration) — mineral

Chalcedony (Common Opal variant)

Silicon dioxide (SiO2) with varying levels of hydration

Quartz with Calcite / Geode Fragment (Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)) — mineral

Quartz with Calcite / Geode Fragment

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)

Amygdaloidal Basalt (Amygdaloidal Basalt) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt

Rainbow Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

K-Feldspar / Granite Pegmatite (Potassium Feldspar (Microcline/Orthoclase) with Quartz) — igneous

K-Feldspar / Granite Pegmatite

Potassium Feldspar (Microcline/Orthoclase) with Quartz

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Scolecite (Scolecite (CaAl2Si3O10·3H2O)) — mineral

Scolecite

Scolecite (CaAl2Si3O10·3H2O)

Quartz (Peach/Pink Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Peach/Pink Variety)

Silicon Dioxide (SiO2)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Fossilized oyster shell in limestone (Bivalvia fossil; chiefly calcite (CaCO₃)) — fossil

Fossilized oyster shell in limestone

Bivalvia fossil; chiefly calcite (CaCO₃)

Slate (Foliated Metamorphic Rock) — metamorphic

Slate

Foliated Metamorphic Rock

Quartz Chip (Silicon Dioxide (SiO2)) — mineral

Quartz Chip

Silicon Dioxide (SiO2)

Quartz pebble with iron inclusions (Silicon Dioxide (SiO2)) — mineral

Quartz pebble with iron inclusions

Silicon Dioxide (SiO2)

Rutilated Quartz (Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions) — mineral

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Manganese-coated Sandstone (Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)) — sedimentary

Manganese-coated Sandstone

Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)

Rough Star Sapphire (Corundum) (Al2O3 (Aluminum Oxide)) — mineral

Rough Star Sapphire (Corundum)

Al2O3 (Aluminum Oxide)

Quartz (Druzy on Matrix) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy on Matrix)

Silicon Dioxide (SiO2)

Coarse Sand or Fine Gravel (Clastic Sediment (unconsolidated)) — sedimentary

Coarse Sand or Fine Gravel

Clastic Sediment (unconsolidated)

Blue Lace Agate (Silicon Dioxide (SiO₂)) — sedimentary

Blue Lace Agate

Silicon Dioxide (SiO₂)

Iron-Stained Quartz (Silicon Dioxide with Iron Oxide (SiO2)) — mineral

Iron-Stained Quartz

Silicon Dioxide with Iron Oxide (SiO2)

Quartz Druze on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

Fossilized Rugose Coral (Order Rugosa) — fossil

Fossilized Rugose Coral

Order Rugosa

Potassium-Rich Silicate Clay (inferred from biological context) (Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)) — mineral

Potassium-Rich Silicate Clay (inferred from biological context)

Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)

Obsidian (Obsidian (Amorphous volcanic glass)) — igneous

Obsidian

Obsidian (Amorphous volcanic glass)

Sandstone (Fluvial Pebble) (Arenite) — sedimentary

Sandstone (Fluvial Pebble)

Arenite

Quartz (Druzy/Macro-crystalline) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy/Macro-crystalline)

Silicon Dioxide (SiO2)

Potassium Feldspar (Orthoclase) (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Diorite (Intermediate intrusive igneous rock) — igneous

Diorite

Intermediate intrusive igneous rock

Granodiorite (River Cobble) (Granodiorite (contains Quartz, Plagioclase Feldspar, Biotite Mica)) — igneous

Granodiorite (River Cobble)

Granodiorite (contains Quartz, Plagioclase Feldspar, Biotite Mica)