Carnelian and White Quartz Bracelet
Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz
mineral
Category
Non Geological
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Rose Quartz
SiO2 (Silicon Dioxide with trace amounts of titanium, iron, or manganese)
mineral
Chert (or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Gold Nugget
Native Gold (Au)
mineral
Anthropogenic Heat Source (Electronic/Industrial Interface)
Thermal IR emission (Electronic infrastructure)
not a rock or mineral
Sedimentary rock with quartz veining
Laminated siltstone or mudstone with hydrothermal quartz veins
sedimentary
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar
mineral
Amethyst
Quartz (SiO2) with trace iron impurities
Mineral
Black Tourmaline
Schorl (Na(Fe2+)_{3}Al_{6} (BO_{3})_{3} (Si_{6}O_{18})(OH)_{4})
Mineral
Basalt Pebble
Extrusive Igneous Rock
igneous
Red Sandstone
Sedimentary Arenite / Quartzose Sandstone
sedimentary
Basalt
Extrusive Igneous Rock (Mafic)
igneous
Sandstone
Clastic sedimentary rock
sedimentary
Leopard Skin Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Granite Pebble with Quartz Vein
Granite (Plutonic Igneous Rock) with Quartz (SiO2)
igneous
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Banded Agate
Silicon Dioxide (SiO2) - Chalcedony
mineral
Jasper and Epidote Breccia
Silicified Brecciated Rock with Epidote
metamorphic
Fossiliferous Limestone (or Bryozoan/Coral Fossil Pebble)
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greenstone with Pyrite inclusions
Greenschist / Meta-volcanic rock with Iron Disulfide (FeS2)
metamorphic
River Stone (Quartzite/Siltstone)
Metamorphosed Siliciclastic Rock (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Lapidary Wax (imitation/wax model)
Hydrocarbon wax blend with colorant (imitating Lapis Lazuli/Emerald)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Ferruginous Sandstone (Gritstone)
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))
sedimentary
River Cobble (likely Basalt or Chert)
Siliceous River Rock / Microcrystalline Quartz / Mafic Igneous
igneous/sedimentary
Sandstone
Arenite
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert / Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Red Sandstone
Arenite (predominantly SiO2 with Fe2O3)
sedimentary
Ferruginous Sandstone
Arenite with Iron Oxide cement (primarily Fe2O3)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greywacke
Lithic Sandstone (Greywacke)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Red Sandstone
Arenite (primarily Quartz, SiO2, with Iron Oxide/Hematite)
sedimentary