Mineral And Metamorphic Rock

Hematite

Ferric Oxide (Fe2O3)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)

Lapis Lazuli

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

Quartzite Pebble (River Rock)

Quartzite (SiO2)

Greenstone

Metabasalt / Greenstone (low-grade metamorphic rock)

Weathered quartz-rich metamorphic rock

Likely quartzite or quartz-rich gneiss; exact identification requires a fresh surface and testing

Quartz / Quartzite

Silicon Dioxide (SiO2)

Iron-stained quartz-rich rock, possibly jasper/quartzite

Quartz (SiO₂) with iron-oxide staining; likely ferruginous quartzite or jasper

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite

Metamorphic Quartzite (SiO2-rich rock)

Mica Schist

Crystalline Schist (often primarily Muscovite or Biotite sheet silicates)

White quartz-rich pebble

Quartz (SiO₂), possibly milky quartz or quartzite

Quartzite (Pink / Peach)

SiO2 (Metamorphosed Quartz Sandstone)

Tumbled dark gray stone, likely basalt

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

Probable weathered granite or granitic gneiss

Granite/granitic gneiss; mainly quartz, feldspar, and mica

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, and Chrysotile, (Mg,Fe)3Si2O5(OH)4)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Tumbled pegmatitic granite

Granite, chiefly quartz–feldspar–mica; likely altered pegmatite

Quartzite River Rock

Metamorphic Rock (Recrystallized Quartz - SiO2)

Eclogite with Garnet

Eclogite (Omphacite-Garnet Metamorphic Rock)

Eclogite

Eclogite (Omphacite-Garnet Metamorphic Rock)

Phyllite

Phyllite (Intermediate grade metamorphic rock)

Quartz with Host Rock Matrix

Silicon Dioxide (SiO2)

Slate

Foliated Metamorphic Rock (composed primarily of Quartz, Muscovite, and Illite)

Quartzite

Metamorphic Quartzite (SiO2)

Greenstone

Metabasalt / Greenschist facies rock

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Gneiss

Gneiss (pronounced 'nice')

Quartz cluster, possibly druzy quartz on matrix

Quartz (SiO₂), likely microcrystalline to coarse crystalline; associated matrix uncertain

Agate with Fossil/Inclusion

Silicon Dioxide (SiO2) with chalcedony and potential fossil inclusion

Quartz-rich metamorphic rock (likely quartzite)

Quartzite, dominantly crystalline SiO₂, with probable iron-oxide staining and minor feldspar/mica

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly crystalline quartz (SiO₂), possibly with mica and feldspar

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly crystalline SiO₂, possibly with iron-oxide staining and minor feldspar or mica

Unakite

Altered Granite (Epidote-bearing Granitic Rock)

Quartzite

Quartzite (composed primarily of Silica, SiO2)

Diamond (Cut Gemstones in Jewelry)

Carbon (C)

Diamond

Diamond (pure carbon, C)

Serpentine / Antigorite

Mg3Si2O5(OH)4 (Serpentine Group)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Pink Granite Gneiss

Granitic Gneiss