Prehnite
Prehnite, Ca2Al(AlSi3O10)(OH)2
mineral
Category
Mineral, Jewelry
Browse mineral, jewelry specimens identified by the Rock Identifier community.
Learn about Mineral, Jewelry in the encyclopedia
View all →
Banded Quartz
Silicon Dioxide (SiO2)
mineral
Carnelian Agate / Iron-Stained Quartz
SiO2
Mineral
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Amazonite
Microcline Feldspar (KAlSi3O8)
mineral
Tiger's Eye
Silicon Dioxide (SiO2) with fibrous inclusions
mineral
Silver Nuggets (Natural or Cast)
Native Silver (Ag)
mineral
Dinosaur Bone
Agatized Dinosaur Bone
sedimentary/fossil
Black Onyx and Mother of Pearl
Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)
mineral
Native Gold (in Jewelry)
Gold (Au)
mineral
Epidote
Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))
mineral
Diamond (in jewelry)
Carbon (C)
mineral
Colorless Quartz (Rhinestone)
Silicon Dioxide (SiO2)
mineral
Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
gemstone
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Ruby (in jewelry)
Corundum (Al2O3 with Chromium traces)
mineral
Iron (Hematite variety)
Iron (Fe) / Hematite (Fe2O3)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Lapis Lazuli
Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)
metamorphic
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Lava Rock (Basaltic Scoria)
Vesicular Basalt
igneous
Diamond (set in a gold ring)
Carbon (C) - Adamantine cubic carbon
mineral
Quartz crystal pendant
Quartz (silicon dioxide, SiO₂), likely rock crystal or milky quartz
mineral
Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Lapis Lazuli
Lazurite-rich metamorphic rock
metamorphic
Purple Chalcedony (likely dyed Agate)
Silicon Dioxide (SiO2)
mineral
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Geode
Quartz / Chalcedony nodule
sedimentary
Malachite
Copper carbonate hydroxide Cu2CO3(OH)2
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Malachite
Copper Carbonate Hydroxide, Cu2CO3(OH)2
mineral
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
mineral
Quartz (specifically Clear and Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral
Lapis Lazuli
(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2 (Complex silicate rock)
rock
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Pearl
Calcium Carbonate (primarily Aragonite and Calcite), CaCO3
mineral
Likely quartz-rich mineral fragment
Quartz (SiO₂), possibly iron-stained or included quartz
mineral
Faceted Gemstone
Unknown transparent mineral, possibly Diamond (C), Cubic Zirconia (ZrO2), Quartz (SiO2), or Glass
gemstone
Ruby (Raw Corundum)
Corundum (Al2O3) with Chromium traces
mineral
Tree Agate
Silicon dioxide (SiO2)
Mineral