Metamorphic Or Igneous Alteration

Weathered basalt or fine-grained mafic rock

Basalt, likely altered/vesicle-poor tholeiitic basalt; exact identification requires testing

Polished green-inclusion stone, likely chlorite-included quartz

Quartz (SiO₂) with chlorite inclusions; exact identification is uncertain from the photograph

Blue Sapphire

Corundum (Al2O3)

Soapstone Carving (Pipestone/Catlinite possible)

Steatite or Argillite

Epidote or Unakite Rock

Epidote-bearing rock / Ca2(Al,Fe)3(SiO4)3(OH)

Polished green stone, likely serpentine or altered basalt

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; exact identification requires testing

Red cut gemstone, likely synthetic ruby

Corundum (Al₂O₃); possibly lab-grown ruby or red glass imitation

Rough Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Blue faceted gemstone, likely synthetic sapphire or blue glass

Corundum (Al₂O₃) if sapphire; identity cannot be confirmed visually

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Banded Rock (likely Quartz-rich)

Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals

Weathered quartz-bearing rock, possibly porphyritic rhyolite

Likely altered rhyolite or dacite containing quartz and feldspar; exact identification requires testing

Milky quartz vein in altered host rock

Quartz (SiO₂), likely with feldspar, mica, and iron-oxide alteration

Quartz (Iron-stained)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Unidentified greenish-gray rock fragment

Tentatively altered basalt or basaltic volcanic rock; mineral identification requires testing

Weathered quartz-rich metamorphic rock, possibly quartzite or gneiss

Quartz-dominant silicate rock; likely quartz (SiO₂) with feldspar, mica, and minor iron-oxide staining

Pink faceted gemstone, likely synthetic cubic zirconia or pink sapphire

Uncertain from image; possible zirconium dioxide (cubic zirconia, ZrO₂) or corundum (pink sapphire, Al₂O₃)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Water-worn greenstone pebble

Greenstone (metamorphosed mafic volcanic rock; commonly chlorite–actinolite–epidote-bearing metabasalt)

Prehnite

Ca2Al(AlSi3O10)(OH)2

Weathered metamorphic rock, likely greenschist or amphibolite

Chlorite–actinolite schist/amphibolite; composition likely quartz, feldspar, chlorite, amphibole, and epidote

White Jade (Nephrite)

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Nephrite Jade

Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)

Yellow-green serpentine (likely)

Serpentine-group phyllosilicate, commonly lizardite or antigorite; approximate formula Mg₃Si₂O₅(OH)₄

Green beryl gemstone (likely emerald or green beryl)

Beryl, Be₃Al₂Si₆O₁₈; green color from chromium/vanadium or iron

Ruby (Raw Corundum)

Corundum (Al2O3:Cr)

Unakite

Granitic rock composed of pink orthoclase feldspar, green epidote, and clear quartz

Unakite

Altered Granite (Plagioclase-Epidote-Quartz Rock)

Unakite (Granite)

Altered Granite (Orthoclase, Epidote, Quartz)

Weathered quartz-bearing metamorphic rock, likely gneiss or quartzite

Quartz-rich gneiss/quartzite with feldspar, mica, and iron-oxide alteration

Unakite

Unakite (Epidotized Granite)

Unakite

Epidotized Granite

Unakite

Unakite (Epidotized Granite)

Green Aventurine

Quartz with fuchsite inclusions (SiO2)

Fuchsite

Chromian Muscovite, K(Al,Cr)2(AlSi3O10)(OH)2

Fuchsite

Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Specular Hematite with Quartz and Limonite

Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)

Unakite

Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Unakite

Epidotized Granite

Epidote with Quartz

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Rutilated Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2 with Epidote/Tourmaline inclusions

Milky Quartz (Water-worn pebble/nodule)

Quartz (Silicon Dioxide - SiO2)