Mineral With Metamorphic Or Igneous Host

Quartz fragment

Quartz (silicon dioxide, SiO₂)

Red garnet (possible almandine or pyrope), cut/polished

Garnet-group silicate; likely almandine, Fe₃Al₂(SiO₄)₃, or pyrope, Mg₃Al₂(SiO₄)₃

White Quartz

Silicon Dioxide (SiO2)

Quartz-rich rock, likely milky quartz vein material

Mostly quartz (SiO₂); exact rock type cannot be determined from the image alone

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Milky Quartz with Garnet/Hematite and Basalt

Silicon Dioxide (SiO2) with Almandine (Fe3Al2Si3O12) and Basalt

Biotite on Quartz Matrix

Biotite - K(Mg,Fe)3(AlSi3O10)(OH,F)2 with Quartz (SiO2)

Chrome Diopside

Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities

Raw Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Quartz Vein

Silicon Dioxide (SiO2)

Mixed polished rock/mineral specimens

Indeterminate from image; likely quartz-bearing material with iron-oxide staining and possibly mica-rich schist

Weathered quartz-bearing rock, possibly calcite vein fragment

Indeterminate; likely quartz (SiO₂) with carbonate minerals such as calcite (CaCO₃)

Quartz (Smoky/Rock Crystal)

Silicon Dioxide (SiO2)

Emerald

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

Quartz-rich pegmatite fragment

Pegmatite composed chiefly of quartz (SiO₂), with probable feldspar and mica inclusions

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz-rich rock fragment (tentative)

Quartz, silicon dioxide (SiO₂), possibly in a weathered host rock

Quartz pebble (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz (Small Pebble)

Silicon Dioxide (SiO2)

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Emerald

Beryl (Be3Al2(SiO3)6)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Quartz Veined Mudstone

Metasedimentary rock with Quartz (SiO2) veins

Quartz-rich pebble, likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly with iron-oxide or feldspar impurities

Quartz pebble with a conchoidal chip

Silicon dioxide (SiO2)

Sapphire

Corundum (Al2O3)

Feldspar (Orthoclase)

Potassium Alveolar Silicate (KAlSi3O8)

Milky Quartz

Silicon Dioxide (SiO2)

Epidote and Quartz in Basalt

Epidote [Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)] in Metabasalt

Garnet in Schist or Pegmatite

Almandine Garnet (Fe3Al2(SiO4)3) in host rock

Dearest Jewelry (Multigemstone)

Combination of Diamond (C), Emerald (Be3Al2Si6O18), Amethyst/Rock Crystal (SiO2), Ruby (Al2O3), Emerald (Be3Al2Si6O18), Sapphire (Al2O3), and Topaz (Al2SiO4(F,OH)2)

Quartz

Silicon Dioxide (SiO2)

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Greenstone / Greenschist

Greenschist (contains chlorite, epidote, actinolite)

Pyrite-bearing Rock

Iron Sulfide (FeS2) associated with host rock

Quartz Vein in Host Rock

Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)

Yellow Aventurine

Quartz (Silicon Dioxide, SiO2) with inclusions

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz-veined altered rock

Likely quartz-bearing metasediment or altered igneous rock; vein mineral: quartz (SiO₂)

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)