Metamorphic Rock (Composed Of Multiple Minerals)

Likely serpentinite (greenstone pebble)

Serpentinite, composed mainly of serpentine-group minerals (e.g., lizardite, chrysotile, or antigorite)

Chakra Crystal Bracelet

Mixed Mineral Assortment

Weathered iron-stained quartzite or sandstone cobble

Quartzite (quartz-rich rock), possibly ferruginous sandstone

Mica-rich schist (probable)

Mica schist, composed mainly of mica minerals with quartz and possibly feldspar

Banded gneiss

Gneiss, commonly composed of quartz, feldspar, and mica/amphibole

Likely banded gneiss

Gneiss, a foliated metamorphic rock composed chiefly of quartz, feldspar, and mica

Greenstone / Serpentinite

Serpentinite (composed primarily of serpentine minerals: Mg3Si2O5(OH)4)

Green serpentine-rich rock (possibly serpentinite)

Serpentinite, composed chiefly of serpentine-group minerals (e.g., lizardite, antigorite, or chrysotile)

Lapis Lazuli

Lapis Lazuli (Rock composed mainly of lazurite, calcite, and pyrite)

Lapis Lazuli (Tumbled)

Lazurite-dominated contact metamorphic rock

Giallo Ornamental Granite

Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)

Weathered slate

Slate, a fine-grained metamorphic rock composed mainly of mica, chlorite, and quartz

Slate

Foliated Metamorphic Rock (composed mainly of clay minerals or micas)

Banded gneiss pebble

Gneiss, a foliated metamorphic rock composed mainly of quartz, feldspar, and dark biotite or amphibole

Likely serpentinite

Serpentinite, composed mainly of serpentine-group minerals (such as antigorite or chrysotile)

Granite

Granite

Marble

Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)

Lapis Lazuli

Na8[Al6Si6O24]Sn (Lazurite-rich metamorphic rock)

Banded gneiss (polished/tumbled cobble)

Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole

River Cobble (Gneiss/Migmatite)

Gneissic Metamorphic Rock (composed mainly of Quartz, Feldspar, and Biotite)

Lapis Lazuli

Complex rock composed mainly of lazurite, calcite, and pyrite

Lapis Lazuli (Tumbled Stone)

Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)

Amphibolite

Amphibolite, composed mainly of amphibole (commonly hornblende) and plagioclase feldspar

Green-and-black mottled metamorphic rock (likely serpentinite)

Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite or lizardite); identification from the photo is provisional.

Slate River Stone

Foliated Metamorphic Rock (composed of illite, chlorite, and quartz)

Slate

Foliated Metamorphic Rock (composed of quartz, illite, and chlorite)

Serpentinite

Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)

Banded Gneiss

Gneiss (Foliated Metamorphic Rock)

Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss)

Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)

Foliated amphibolite (likely augen or spotted amphibolite)

Amphibolite, composed chiefly of hornblende and plagioclase; exact identification requires close examination

Gneiss

Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)

Quartz-veined Sandstone Pebble

Quartzite-veined Arenite

Slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Polished mixed rock, likely orbicular/epidote-bearing granite or basalt

Uncertain; probable quartz–feldspar–amphibole/epidote aggregate

Gneiss

Metamorphic Gneiss

Botryoidal Hematite (Kidney Ore)

Iron(III) oxide (Fe2O3)

Weathered gneiss

Banded gneiss, commonly composed of quartz, feldspar, and mica

Likely blue-gray slate

Slate, a fine-grained rock composed mainly of mica-group minerals and quartz

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Banded gneiss pebble

Gneiss, a foliated metamorphic rock composed mainly of quartz, feldspar, and mica or amphibole

Gneiss

Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica/Amphibole)

River Stone / Pebble

Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)