Anthropogenic (Man Made Artifact)

Mookaite Jasper

Silicified Radiolarite (SiO2 with impurities)

Rose Quartz

Rose Quartz (SiO₂)

Fluorite (likely)

Calcium Fluoride (CaF2)

Quartz

Quartz (SiO₂)

Citrine Geode (or Druzy Citrine)

Silicon Dioxide (SiO₂) - a variety of Quartz

Red Jasper or Chert

Jasper (SiO2, a variety of chalcedony with iron oxide impurities), Chert (SiO2)

Rose Quartz

Rose Quartz (SiO2)

Gneiss

Gneiss (High-grade metamorphic rock)

Granite with Mafic Inclusions

Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)

Peridot

Olivine ((Mg,Fe)2SiO4)

Pegmatite with Schorl (Black Tourmaline) and Mica

Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)

Geode (Unopened)

Silica-rich Concretion (primarily SiO2)

Crushed Limestone and Calcite

Calcium Carbonate (CaCO3)

Crinoid Fossil in Limestone

Crinoid (Class Crinoidea) in Fossiliferous Limestone (CaCO3)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Pink Granite

Phaneritic Felsic Igneous Plutonic Rock

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Granite

Granite (Felsic Plutonic Rock)

Rose Quartz

Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron

Moonstone (specifically White Moonstone or Girasol Quartz)

Potassium aluminum silicate (KAlSi3O8)

Basalt

Basalt (composition predominately plagioclase feldspar and pyroxene)

Sandstone (likely Ferruginous)

Sandstone (SiO2 with iron oxides)

Quartz

Silicon Dioxide (SiO2)

Ruby

Corundum (Al₂O₃) with Chromium (Cr)

Sandstone

Sandstone (clastic sedimentary rock)

Banded Gneiss

Gneiss (pronounced 'nice')

Pyrite

Pyrite (FeS2)

Quartz (likely milky quartz or a stained variety)

Silicon Dioxide (SiO₂)

Schist

Schist (various mineral compositions)

Fossil Coral

Coral Limestone (a type of biogenic sedimentary rock)

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.

Banded Gneiss

Gneiss (variable mineral composition)

Bivalve Shell (Fossil or Contemporary)

Class Bivalvie (various genera and species of clams, cockles, etc.)

Quartz (chalcedony variety) or Limestone with Quartz Veins

SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Sandstone (Pebble/Cobble)

Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

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.

Diorite (Spotted or Dalmatian Stone pattern)

Diorite

Chert (Common Opal/Agate inclusion)

Microcrystalline Quartz (SiO2)

Honey Calcite

Calcium Carbonate (CaCO3)

Serpentinite (Serpentine Rock)

Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.