Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Category
Sedimentary (Microcrystalline Quartz)
Browse sedimentary (microcrystalline quartz) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Microcrystalline Quartz) in the encyclopedia
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Red Jasper
Quartz (Silicon Dioxide) with Hematite inclusions, SiO2
mineral
Petrified Wood
Silicified Wood (primarily SiO₂ - Silicon Dioxide)
metamorphic
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Mineral
Jasper in Rhyolite matrix
Silicon Dioxide (SiO2) with various inclusions in Felsic Igneous matrix
igneous
Red Jasper
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
mineral
Jasper
Silicon dioxide (SiO2) with iron inclusions
sedimentary
Chert (specifically Tan/Yellow Chert)
Silicon Dioxide (SiO2)
sedimentary
Jasper and Quartz conglomerate (River Rock)
Silicon Dioxide (SiO2) - Chalcedony and Quartz variety
sedimentary
Yellow Jasper
Chalcedony/Quartz (SiO2) with iron hydroxides (Goethite)
sedimentary
Carnelian (Banded Agate)
Carnelian Chalcedony (SiO2)
mineral
Zebra Jasper (Zebra Stone)
Silicon Dioxide (SiO2) with iron oxide and manganese inclusions
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary
Aventurine (Green)
Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2
metamorphic
Red Jasper
Silicon Dioxide (SiO₂)
sedimentary
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Fairburn Agate
Cryptocrystalline Quartz (SiO2) with trace Iron Oxides
mineral
Yellow Chalcedony (common opal or chert variant)
Silicon Dioxide (SiO2)
sedimentary (mineraloid/microcrystalline quartz)
Jasper with Quartz Veining
Silicon Dioxide (SiO2) with impurities such as Fe2O3
sedimentary
Chert (Quartz Pebble)
Silicon Dioxide (SiO2)
sedimentary
Banded Agate (Pink Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Ironstone Concretion (likely)
Goethite/Hematite/Limonite cemented sediment
Sedimentary Rock
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Quartz (likely a form of massive or vein quartz)
Quartz (SiO₂)
Mineral
Quartzite (with Quartz Veining)
Quartzite (SiO2)
metamorphic
Red Jasper
SiO2 (Microcrystalline Quartz)
Mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)
sedimentary
Coral Fossil (Agatized Coral or Petoskey Stone)
Hexagonaria percarinata (if Petoskey) or generally Scleractinia (Agatized Coral)
Sedimentary/Fossil
River Siltstone Pebble
Siltstone (composed mainly of silt-sized quartz and feldspar)
sedimentary
Heliotrope (Bloodstone)
Cryptocrystalline Quartz (SiO2) with inclusions of Hematite (Fe2O3)
mineral
River Pebbles (Sandstone and Quartzite)
SiO2 (Quartz) dominated clastic rocks
sedimentary and metamorphic
Jasper
Silicon Dioxide (SiO2) with iron and magnesium inclusions
sedimentary
Jasper
Silica (SiO2) with impurities
Sedimentary/Mineral
Yellow Jasper
Chalcedony (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Milky Quartz with Chlorite Schist Inclusions
Quartz (SiO2) with Chlorite Group silicates (typically (Mg,Fe)3(Si,Al)4O10(OH)2)
metamorphic
Siltstone Pebble
Siltstone (composed of microscopic quartz and clay minerals)
sedimentary
Red Jasper
Cryptocrystalline Quartz (SiO2 with Iron oxide inclusions)
sedimentary
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Bloodstone
Heliotrope (cryptocrystalline Quartz, SiO2 with inclusions of Hematite)
sedimentary
Jasper Beach Pebble
Silicon Dioxide (SiO2) - Macro-crystalline Quartz
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz
sedimentary
Bloodstone Jasper (Heliotrope)
SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz
sedimentary