Organic Materia (Not A Rock Or Mineral)

Jasper

Microcrystalline Quartz (SiO2 with iron oxide impurities)

Jasper

Microcrystalline Quartz (SiO2)

Chakra Crystal Bracelet

Mixed Mineral Assortment

Sandstone

Arenite (primarily SiO2)

Granite Pebble

Felsic intrusive igneous rock (composition: Quartz, Feldspar, Mica)

Limestone

Calcium Carbonate (CaCO3)

Sandstone

Quartz Arenite / Sedimentary Rock

Granite

Plutonic felsic igneous rock

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (Silicon Dioxide with various mineral cements)

Sandstone (Greywacke/Siltstone variant)

Arenite / Wacke (SiO2 with diverse mineral inclusions)

Sandstone

Sandstone (Siliciclastic Sedimentary Rock)

Granite

Felsic intrusive igneous rock

Pale blue-gray quartz-rich pebble (tentative)

Quartz, SiO₂, possibly chalcedony or a weathered metamorphic fragment

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Likely weathered metallic mineral or slag fragment

Indeterminate; possibly iron-rich sulfide/oxide material or industrial slag

Sandstone

Arenite

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)

Agate Geode Slice (with Druzy Quartz)

Silicon Dioxide (SiO2)

Sandstone Pebbles

Arenite (primarily SiO2 with mineral cement)

Amygdaloidal Basalt

Amygdaloidal Mafic Volcanic Rock (Basalt)

Sandstone

Sedimentary Rock (Quartz arenite)

Chert (Arrowhead Preform)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Agate in Rhyolite

Silicon Dioxide (Quartz/Chalcedony) in Volcanic Rock matrix

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Copper Ore (Malachite/Chrysocolla bearing)

Cupriferous rock containing secondary copper minerals like Cu2CO3(OH)2

Turquoise in Matrix

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Sandstone

Quartz Arenite / Clastic Sedimentary Rock

Sandstone (likely Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Feldspar (Plagioclase / Orthoclase)

KAlSi3O8 / CaAl2Si2O8 - NaAlSi3O8

Granite (Giallo Ornamental / Venetian Gold)

Granite (composed mainly of Quartz, Feldspar, Biotite, and Garnet)

Sandstone Pebble

Sedimentary Rock (Quartzose Sandstone)

Banded Agate

SiO2 (Silicon Dioxide)

Limestone

Calcium Carbonate (CaCO3)

Chert

Microcrystalline Quartz (SiO2)

Turquoise

Hydrate phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Sandstone

Arenite (specifically Quartz Arenite)

Sandstone

Sedimentary Rock (Quartz arenite or arkose)

Grey Pebble (Sandstone / Quartzite Pebble)

Sedimentary rock (primarily Quartz - SiO2)