Mineral And Metamorphic Rock

Quartz Veined Mudstone

Metasedimentary rock with Quartz (SiO2) veins

Greenstone (likely chlorite-rich metamorphic rock)

Chlorite-bearing greenschist; exact identification requires testing

Rounded calcite-rich limestone or marble pebble

Calcite (CaCO₃), likely recrystallized limestone (marble)

Small quartz fragment, possibly milky quartz

Quartz (SiO₂)

Likely foliated metamorphic rock (gneiss or schist)

Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface or tests

Weathered quartz-rich metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica gneiss/schist (tentative; image resolution limits certainty)

Milky quartz with iron-oxide staining

Quartz, silicon dioxide (SiO₂), likely partially translucent massive quartz

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Gneiss

Gneiss (Metamorphic Rock)

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Quartz-veined metamorphic rock, likely schist or gneiss

Quartz–feldspar–mica rock; exact identification requires testing

Mixed Rock Collection (Pebbles and Stones)

Various geological specimens

Gneiss

Foliated Metamorphic Rock

Slate

Slate (Metamorphic Rock)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Banded gneiss (likely biotite-bearing)

Gneiss; quartz–feldspar–mica assemblage, with possible iron-oxide staining

Uncertain small stone; possibly weathered quartz-bearing rock

Indeterminate from image; candidate materials include quartz-rich pebble or altered silicate rock

Rock crystal quartz fragment

Quartz (silicon dioxide, SiO₂)

Gray slate or fine-grained metamorphic rock

Slate–phyllite spectrum; predominantly fine-grained quartz, mica, and chlorite

Milky quartz fragment

Quartz, silicon dioxide (SiO₂)

Quartzite with Iron Staining

Metamorphic Quartz Sandstone

Schorl (Black Tourmaline)

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)

Clear quartz (likely quartz crystal fragment)

Quartz, silicon dioxide (SiO₂)

Gneiss

Banded Metamorphic Rock (Gneiss)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz crystal fragment (likely milky/inclusion-rich quartz)

Quartz, silicon dioxide (SiO₂)

Quartz crystal (likely iron-stained quartz)

Quartz, SiO₂

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Gneiss

Gneissic Metamorphic Rock

Honey-colored quartz cluster

Quartz, silicon dioxide (SiO₂), likely iron-stained or included quartz

Gneiss

Foliated Metamorphic Rock (Gneiss)

Tumbled quartz crystal

Quartz (silicon dioxide, SiO₂)

Quartz vein rock with iron-oxide staining

Milky quartz (SiO₂), locally stained by hematite/goethite; possible feldspar or host-rock fragments

Banded Gneiss

Gneiss (Metamorphic Rock)

Quartzite Pebble

Quartzite (mostly SiO2)

Quartz-veined dark metamorphic rock, likely marble or serpentinite

Calcite- or magnesite-veined serpentinite/marble; exact identification requires testing

Quartz-veined Metamorphic Rock

Quartz-veined Schist or Gneiss

White quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Clear quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Gneiss

Foliated quartz–feldspar gneiss, likely biotite-bearing

Schist

Schist (metamorphic rock)