Rock Identifier

Category

Synthetic Or Natural Fiber

Browse synthetic or natural fiber specimens identified by the Rock Identifier community.

Learn about Synthetic Or Natural Fiber in the encyclopedia

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zircon

Oregon Opal

Orendite

Orthoclase

Orca Agate

Orange Opal

Peacock Ore

Orange Garnet

Oregon Sunstone

Oregon Sunstone

Orange Obsidian

Orange Calcite

Quartz Pebble (Tumbled / River Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble (Tumbled / River Pebble)

Silicon Dioxide (SiO2)

Green Quartzite / Quartz Pebble (SiO2 (Silicon Dioxide with inclusions)) — metamorphic

Green Quartzite / Quartz Pebble

SiO2 (Silicon Dioxide with inclusions)

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Sandstone (Quartzose type) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose type)

Arenite (primarily SiO2)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Green Quartz (likely Aventurine or Prasiolite) (Silicon Dioxide (SiO2) with inclusions) — mineral

Green Quartz (likely Aventurine or Prasiolite)

Silicon Dioxide (SiO2) with inclusions

Diamond (Rough) (Diamond (Carbon, C)) — Mineral

Diamond (Rough)

Diamond (Carbon, C)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper) (Chalcedony (SiO₂)) — Mineral (or mineraloid if microcrystalline)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

Mineral (or mineraloid if microcrystalline)

Orange Quartz (or Citrine Quartz) (Silicon Dioxide (SiO2)) — mineral

Orange Quartz (or Citrine Quartz)

Silicon Dioxide (SiO2)

Citrine or Yellow Quartz (Quartz (SiO2) with iron impurities) — mineral

Citrine or Yellow Quartz

Quartz (SiO2) with iron impurities

Diamond (Diamond (pure carbon; C)) — Mineral

Diamond

Diamond (pure carbon; C)

Tiger's Eye (Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)) — Mineral

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)

Tumbled carnelian (orange chalcedony) (Carnelian, a microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides) — gemstone

Tumbled carnelian (orange chalcedony)

Carnelian, a microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides

Glazed Ceramic Tile (Fused Silicate-Clay composite) — Synthetic (Man-made material mimicking natural stone)

Glazed Ceramic Tile

Fused Silicate-Clay composite

Synthetic (Man-made material mimicking natural stone)

Tumbled Yellow Quartz (Golden Quartz / Citrine) (Silicon Dioxide (SiO2)) — mineral

Tumbled Yellow Quartz (Golden Quartz / Citrine)

Silicon Dioxide (SiO2)

Polished/tumbled orange calcite-rich stone (Calcite (CaCO₃), possibly with aragonite and iron-oxide inclusions) — mineral

Polished/tumbled orange calcite-rich stone

Calcite (CaCO₃), possibly with aragonite and iron-oxide inclusions

Tumbled greenstone, likely serpentine (Serpentinite/serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; possibly chlorite-bearing greenstone) — metamorphic

Tumbled greenstone, likely serpentine

Serpentinite/serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; possibly chlorite-bearing greenstone

Yellow Quartz (Golden Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Golden Quartz)

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Red Jasper with Quartz Veining (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Red Jasper with Quartz Veining

Jasper (Silicon Dioxide, SiO2)

Banded Agate (Chalcedony (Cryptocrystalline Silica) SiO2) — mineral

Banded Agate

Chalcedony (Cryptocrystalline Silica) SiO2

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Red Tiger's Eye beads (Tiger's Eye (variety of Chalcedony, SiO2)) — Mineral / Gemstone (variety of Quartz)

Red Tiger's Eye beads

Tiger's Eye (variety of Chalcedony, SiO2)

Mineral / Gemstone (variety of Quartz)

Yellow Quartz / Citrine Pebble (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz / Citrine Pebble

Silicon Dioxide (SiO2)

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

Green Chalcedony (Green Agate)

Silicon Dioxide (SiO2)

Sodalite (Sodalite (Na4Al3Si3O12Cl)) — Mineral

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Limestone (Buff/Tan) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Buff/Tan)

Calcium Carbonate (CaCO3)

Weathered, porous limestone (probable fossiliferous limestone) (Calcite-rich limestone; predominantly CaCO₃) — sedimentary

Weathered, porous limestone (probable fossiliferous limestone)

Calcite-rich limestone; predominantly CaCO₃

Quartz (Yellow / Citrine Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Yellow / Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Quartz (Citrine or Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Yellow Quartz / Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Brown Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Brown Quartz Pebble

Silicon Dioxide (SiO2)

Yellow Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine/Iron-Stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine/Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Emerald (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Tumbled granite or granitic gneiss (Granite, primarily quartz, alkali feldspar, plagioclase, and dark biotite/amphibole) — igneous

Tumbled granite or granitic gneiss

Granite, primarily quartz, alkali feldspar, plagioclase, and dark biotite/amphibole

Yellow Quartz / Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate) (N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)) — Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)

Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)

N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)

Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)

Polished black pebble, likely basalt (Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine) — igneous

Polished black pebble, likely basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine

Iron Ore / Hematite / Ironstone Nodule (Hematite / Goethite (Fe2O3 / FeO(OH))) — sedimentary

Iron Ore / Hematite / Ironstone Nodule

Hematite / Goethite (Fe2O3 / FeO(OH))