Anthropogenic (Man Made Product Subject To Geological Processes)

Malachite

Malachite (Cu2CO3(OH)2)

Gneiss

Gneiss (a metamorphic rock)

Quartz (Crystal/Druzy Quartz)

Quartz (SiO₂)

Moss Agate

Moss Agate (a variety of Chalcedony, SiO ₂)

Granite

Granite (a common term for a felsic intrusive igneous rock)

Quartz (likely a weathered/tumbled piece)

Quartz (SiO₂)

Quartz

SiO₂ (Silicon Dioxide)

Shale (possibly)

Shale (fine-grained clastic sedimentary rock)

Citrine

Quartz (SiO₂)

Quartzite

Quartzite (primarily SiO2)

Banded Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

Quartz (likely)

Quartz (SiO2 - Silicon Dioxide)

Chalcedony Geode

Chalcedony (SiO2) within a geode structure

Sandstone

Sandstone (various mineral compositions)

Prasiolite and Quartz Crystal Cluster

Quartz (SiO2); Prasiolite is a variety of Quartz

Prehnite with Epidote inclusions

Prehnite: Ca2Al(AlSi3O10)(OH)2; Epidote: Ca2(Al,Fe)3(SiO4)3(OH)

Chert (Jasper or Flint variant)

Chert (composed of microcrystalline quartz, SiO2)

Soapstone

Steatite (primarily composed of Talc, Mg₃Si₄O₁₀(OH)₂)

Green Aventurine

Aventurine (a variety of Quartz, SiO2 with fuchsite inclusions)

Chert (often referred to as 'Jasper' when red)

Chert (microcrystalline quartz, SiO₂)

Shale with Vein Infillings

Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.

Quartz

Quartz (SiO2 - Silicon Dioxide)

Porphyritic Basalt or Diabase with Plagioclase Phenocrysts

Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar

Scoria (Volcanic Rock)

Scoria (often basaltic scoria)

Citrine Geode (or Druzy Citrine)

Silicon Dioxide (SiO₂) - a variety of Quartz

Botryoidal Chalcedony

Chalcedony (SiO2)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Dark-colored Igneous Rock (likely Basalt or Diabase)

Basalt (extrusive igneous) or Diabase (intrusive igneous)

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Banded Jasper (possibly "Picture Jasper")

Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)

Moonstone

Adularia (orthoclase) or Albite (plagioclase), a feldspar mineral (KAlSi3O8 or NaAlSi3O8 respectively, often a mixture)

Basalt

Basalt

Jade

Jadeite or Nephrite (both are commonly referred to as 'jade'). Jadeite: NaAlSi2O6; Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2.

Rose Quartz

Rose Quartz (SiO2)

Jade

Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.

Leopard Skin Jasper

Chalcedony (cryptocrystalline quartz) with inclusions

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with various inclusions

Quartzite

Quartzite

Laterite

Laterite (no specific mineral formula as it's a rock type)

Rose Quartz

Rose Quartz (SiO2)

Agate (or Banded Agate)

Agate (a variety of Chalcedony, which is a cryptocrystalline form of Quartz); Chemical Formula: SiO₂ (Silicon Dioxide)