Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Category
Browse mineral (native element) specimens identified by the Rock Identifier community.
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Schist
Schist (various mineral compositions)
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Yellow Quartz (Citrine-colored Quartz Pebble)
Silicon Dioxide (SiO2)
Serpentinite (Serpentine Rock)
Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Green Druzy Quartz (Prasiolite)
Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)
Blue Agate (Dyed Chalcedony)
Silicon Dioxide (SiO2)
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony / Quartz Variety
Mixed Gemstone Beaded Jewelry
Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Chrysoprase
Chalcedony (cryptocrystalline SiO2 variety)
Halite (Rock Salt)
Halite; NaCl (Sodium Chloride)
Sandstone
Sandstone (Clastic Sedimentary Rock)
Schist
N/A (a rock type, not a mineral formula)
Golden Sheen Obsidian
Obsidian (volcanic glass) with inclusions of gas bubbles and mineral crystals (e.g., hematite, magnetite) causing the sheen
Banded Gneiss
Gneiss (pronounced "nice")
Black Tourmaline (Schorl)
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Serpentine
Serpentine group minerals (e.g., Antigorite, Chrysotile, Lizardite). Chemical formula: (Mg, Fe)₃Si₂O₅(OH)₄
Agate (or Banded Agate)
Agate (a variety of Chalcedony, which is a cryptocrystalline form of Quartz); Chemical Formula: SiO₂ (Silicon Dioxide)
Included Quartz Beads (likely Phantom Quartz or Garden Quartz)
Quartz (SiO2) with various mineral inclusions
Basalt
Basalt
Granite
Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)
BROWN GRANITE (likely 'Tan Brown' or similar)
Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Conglomerate (Puddingstone)
Conglomerate (specifically, clastic sedimentary rock)
Jasper (yellow/cream variety)
SiO₂ (Cryptocrystalline Quartz)
Carnelian
Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO2)
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Gneiss
Gneiss (pronounced 'nice')
Muscovite Mica
Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2
Muscovite Mica
Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Rose Quartz
Rose Quartz (SiO₂)
Conglomerate
Conglomerate