Chalcedony (Quartz Nodule)
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.
Sandstone (Quartzose)
Arenite (SiO2 principal)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble (Milky and Gray)
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Crystal/Druzy Quartz)
Quartz (SiO₂)
Mineral
Jasper Breccia
Silicon Dioxide (SiO2) - Brecciated Microcrystalline Quartz
sedimentary
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Amethyst Geode (Thunderegg)
Silicon Dioxide (SiO2) - Quartz Variety: Amethyst
mineral
Quartz (likely milky/gray variety)
Quartz (SiO₂)
Mineral
Lake Superior Agate
Cryptocrystalline Quartz (SiO2)
mineral
Blue Banded Agate (Dyed)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Ferruginous Quartz
Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions
mineral
Obsidian
Amorphous volcanic glass (SiO2)
igneous
Quartz
Silicon Dioxide (SiO2)
Mineral
Chert (within Limestone)
Silicon Dioxide (SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst (Rough Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Banded Agate (Agatized Geode Slice)
Silicon Dioxide (SiO₂)
mineral
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2
metamorphic
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Milky Quartz
Silicon dioxide (SiO2)
mineral
Banded Agate (specifically Gobi Eyes or Eye Agate)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Druzy on Matrix)
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
mineral
Snakeskin Agate
Agate (Cryptocrystalline Quartz, SiO2)
mineral
Apache Tear
Obsidian (Hydrated Volcanic Glass - SiO2)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Dragon Blood Jasper
Epidote-rich Quartzite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Malachite
Malachite (Copper carbonate hydroxide), Cu2CO3(OH)2
mineral
Red Jasper
Jasper (Silicate Mineral - SiO2)
sedimentary
Chalcedony in Host Rock
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Mica inclusions
Quartz (Silicon Dioxide, SiO2)
mineral