Sedimentary Or Metamorphic (Low Grade)

Serpentine

Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4

Chlorite (Small Flakes/Sand)

Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Actinolite

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

Greenstone (River Pebble)

Metabasalt / Greenschist

Slate

Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)

Celadonite in Basalt (Green Earth)

Celadonite (K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2)

Epidote

Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))

Limonite (Iron Ore)

Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Likely slate or fine-grained metamorphic rock

Slate; predominantly microcrystalline quartz, mica, and clay minerals

Greenstone

Metabasalt / Greenschist

Unidentified River Rock or Mudstone

N/A (Generic rock fragment)

Greenschist

Greenschist (Chlorite Schist)

Ironstone Concretion

Siderite or Hematite Concretion

Greenstone (likely chlorite-rich metamorphic rock)

Greenschist; commonly composed of chlorite, actinolite, and epidote, with possible albite

Dark gray metamorphic rock, likely slate or phyllite

Fine-grained foliated rock composed mainly of mica, chlorite, and quartz; exact identification requires testing

River Cobble (likely Metasedimentary or Basalt)

Metamorphosed Siltstone or Altered Fine-grained Igneous Rock

Epidote (Greenstone)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Foliated metamorphic rock, likely slate or phyllite

Slate–phyllite; primarily quartz, mica, and clay-derived minerals

Greenstone

Metabasalts and metavolcanics

Basalt with Epidote (Greenstone)

Epidote-bearing Metabasalt

Nephrite Jade

Nephrite (Silicate mineral: Ca2(Mg, Fe)5Si8O22(OH)2)

Greenstone

Chlorite schist or metabasalt depending on specific composition

Jasper / Chert (Iron-stained Quartz)

SiO2 (Silicon Dioxide with Iron Oxide inclusions)

Brecciated Jasper or Chert

SiO2

Quartz Pebble with Chlorite or Epidote Inclusions

Silicon Dioxide (SiO2) with inclusions

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartzite Pebble

Quartzite

Limonite Nugget

Limonite (Hydrated iron oxide-hydroxide, FeO(OH)·nH2O)

Limonite

FeO(OH)•nH2O

Polished tiger’s eye

Quartz (microcrystalline SiO₂) with crocidolite-derived iron oxides

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Mica Schist (with Golden/Biotite inclusions)

K(Mg,Fe)3AlSi3O10(F,OH)2 (Biotite), KAl2(AlSi3O10)(F,OH)2 (Muscovite)

Green Chalcedony Ring

Silicon Dioxide (SiO2)

Fossil-bearing fine-grained sedimentary rock

Likely fossiliferous mudstone or shale; visible feature may be a plant fragment, trace fossil, or mineral vein

Greenish-gray slate fragment

Slate; fine-grained metamorphosed mudstone, commonly mica- and chlorite-bearing

Epidote

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

Epidote

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

Anthracite Coal

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Epidote in Matrix (Dragon Stone variant)

Epidote with Quartz/Feldspar (Ca2(Al,Fe)3(SiO4)3(OH))

Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

Greenstone

Greenschist (containing chlorite, epidote, and actinolite)