Unakite
Unakite (Epidotized Granite)
metamorphic
Category
Organic Gemstone (Often Associated With Sedimentary Sequences)
Browse organic gemstone (often associated with sedimentary sequences) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Often Associated With Sedimentary Sequences) in the encyclopedia
View all →![Chrysocolla (with Quartz and Azurite) (Hydrated copper phyllosilicate mineral [Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)]) — mineral](https://media.rockidentification.com/201b7890-f15a-45aa-9603-fb073bb0435d-thumbnail.jpg)
Chrysocolla (with Quartz and Azurite)
Hydrated copper phyllosilicate mineral [Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)]
mineral
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Chert (Brown variety / Common Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Chalcedony mix)
Microcrystalline Quartz (SiO2)
sedimentary
Peach Moonstone (Orange/Peach Feldspar)
Potassium aluminum silicate (KAlSi3O8)
mineral
Chrysocolla
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Unakite
Epidotized Granite
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Chert (Chert Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint or Jasper)
Cryptocrystalline quartz (SiO2)
sedimentary
Amazonite
Microcline (KAlSi3O8) with lead impurities
mineral
Imperial Topaz
Al2SiO4(F,OH)2
mineral
Amber
Organic gemstone (Succinite)
mineral
Chert (often called Flint in dark varieties)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Jade Dice
Nephrite / Jadeite (Ca2(Mg,Fe)5Si8O22(OH)2 or NaAlSi2O6)
gemstone
Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)
Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)
Mineral for Fluorite; Mineral/Rock for Jadeite (as it's often a rock composed primarily of jadeite mineral)
Jadeite Bangle
NaAl(Si2O6)
gemstone
Beryl (likely Aquamarine or Green Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Botryoidal pyrite (likely with quartz or chlorite matrix)
Pyrite, FeS₂; botryoidal aggregate
mineral
Quartz with Mica/Host Rock
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Sunstone
Heliolite (Aventurine Feldspar, (Ca,Na)((Al,Si)2Si2O8))
mineral
Bloodstone (Heliotrope)
Cryptocrystalline Quartz (SiO2) with inclusions of Hematite or Chlorite
mineral
Malachite
Copper carbonate hydroxide Cu2CO3(OH)2
mineral
Peach Moonstone
Orthoclase (Potassium Aluminum Silicate), KAlSi3O8
mineral
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Gray chert or silicified limestone
Microcrystalline quartz (SiO₂), possibly with calcite (CaCO₃)
sedimentary
Fossiliferous Shale
Carbonaceous Shale (with potential plant/aquatic fossils)
sedimentary
Aquamarine
Beryl (Be₃Al₂Si‑₆O₁‑₈)
mineral
Black Opal
Amorphous Hydrated Silica (SiO2·nH2O)
mineral