Man Made Glass

Sandstone

Arenite or Sandstone

Diamond

Diamond (pure carbon; C)

Quartzite

Quartzite (primarily SiO2)

Sandstone (Pebble/Conglomerate fragment)

Sandstone (clastic sedimentary rock)

Granite

Granite (a felsic intrusive igneous rock)

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

Chert (microcrystalline quartz, SiO₂)

Quartz (likely)

Quartz (SiO2 - Silicon Dioxide)

Quartz (milky quartz variety)

Quartz (SiO₂)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Epidote (or Epidote-rich rock)

Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).

Onyx Marble (also commonly called Onyx)

Calcite (CaCO3), often with other mineral impurities

Basalt

Basalt (dominated by plagioclase feldspar and pyroxene)

Granite

Granite (felsic intrusive igneous rock)

Amethyst Geode/Cluster

Quartz (SiO2) - variety Amethyst

Granite (likely a river or beach pebble)

Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)

Labradorite (likely Black Labradorite or Larvikite)

Labradorite (Na,Ca)(Al,Si)4O8. If a rock, it is typically anorthosite, gabbro, or norite, or a variety of syenite called Larvikite if it is specifically from Larvik, Norway.

Peridot and Citrine Gemstones (in a ring setting)

Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)

Rose Quartz

Rose Quartz (SiO2)

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)

Quartzite

Quartzite (primarily composed of SiO O₂)

Leopard Skin Jasper

Chalcedony (cryptocrystalline quartz) with inclusions

Jasper (likely a variety of Brecciated Jasper or a patterned variety)

Silicon dioxide (SiO2)

Banded Jasper (possibly "Picture Jasper")

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

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Black Chert

Chert (microcrystalline quartz)

Banded Agate (variety of Chalcedony)

Agate (SiO2)

Agate (or Banded Agate)

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

Sandstone

Sandstone (Clastic Sedimentary Rock)

Granite

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)

Red Chalcedony (likely dyed)

Chalcedony (a variety of 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.

Agate

Agate (a cryptocrystalline variety of Quartz, SiO₂)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Sandstone

Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)