Blue Chalcedony
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic glass (high silica SiO2)
igneous
Agate
SiO2
Mineral
Jasper (likely Polychrome or Mookaite variants)
Silicon Dioxide (SiO2) with iron oxide and hydroxide inclusions
sedimentary (chemically precipitated)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Quartz Pebble (Iron-Stained)
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz/Clear Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Chalcedony (Carnelian variety)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary component
Specular Hematite (Specularite) in Matrix
Specularite (Fe2O3)
mineral
Jasper (Iron-stained Quartzite/Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
Sedimentary
Raw Diamond (Rough Uncut)
Diamond (C - pure carbon)
mineral
Banded Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Caribbean Calcite
Aragonite and Calcite (CaCO3)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Crazy Lace Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Metamorphosed Sandstone (SiO2)
metamorphic
Chert Nodule (Fossiliferous Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Orange Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Mahogany Obsidian
Obsidian (volcanic glass with Hematite/Magnetite inclusions)
igneous
Yellow Jasper
Silicon Dioxide with iron inclusions (SiO2)
mineral
Honey Calcite Sphere
Calcium Carbonate (CaCO3)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Zoisite with Ruby (Anyolite)
Anyolite (Ca2Al3(SiO4)3(OH) + (Hb, Al, Cr)2O3)
metamorphic
Quartz
Quartz (Silicon Dioxide - SiO2)
Mineral
Jasper with Agate Inclusions
Silicon Dioxide (SiO2) - variety of Quartz/Chert
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Yellow/Brown Jasper)
Silicon Dioxide (SiO2)
sedimentary
Fluorite
Calcium fluoride (CaF2)
mineral
Clear Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (specifically Iron-stained Quartz Sandstone)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary (microcrystalline quartz)