Sedimentary And Igneous

Pyrite

Iron Sulfide (FeS2)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Quartz Geode

Silicon Dioxide (SiO2) within a sedimentary or igneous host

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Sedimentary or Igneous Matrix

Quartz Geode

Silicon Dioxide (SiO2) within Sedimentary or Igneous host

Pyrite

Iron Sulfide (FeS2)

Fluorite

Calcium Fluoride (CaF2)

Red Jasper

Silicon Dioxide with Iron Oxide inclusions (SiO2)

Garnet

Garnet (X3Y2(SiO4)3)

Lava Stone and Chakra Beads

Basalt (with various mineral/synthetic beads)

Garnet Gneiss

Garnetiferous quartzo-feldspathic gneiss

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Green Fluorite

Calcium Fluoride (CaF2)

Gneissic Schist

Gneiss-schist (Metamorphic rock)

Fluorite

Calcium Fluoride (CaF2)

Gneiss

Gneiss (Metamorphic Rock)

Garnet Gneiss

Gneiss containing Almandine Garnet

Opal

Hydrated Silica (SiO2·nH2O)

Garnet in Host Rock

Garnet Group (A3B2(SiO4)3)

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Gneiss (with Garnet)

Gneiss (Feldspar-Quartz-Biotite-Garnet Metamorphic Rock)

Quartz Geode / Druzy Quartz Node

Silicon Dioxide (SiO2)

Fluorite with Quartz coating

Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)

Healer's Gold (Pyrite and Magnetite in Schist)

Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist

Fluorite

Calcium Fluoride (CaF2)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Red Jasper

Silicon Dioxide (SiO2) - variety of Chalcedony

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Unopened Geode

Geode (containing various mineralization like Quartz SiO2)

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Red Garnet (likely Almandine or Pyrope)

Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in Geode form

Banded Gneiss

Gneiss

Banded Gneiss Pebble

Gneiss (Metamorphic Rock)

Fluorite

Calcium Fluoride (CaF2)

River Stone (Chalcedony/Jasper variety)

Microcrystalline Quartz (SiO2)

Gneiss

Gneissic Metamorphic Rock

Quartz Vein in Schist

Quartz-rich Micaceous Schist (SiO2 + phyllosilicates)

Gneiss

Gneiss

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions