Igneous Or Metamorphic (Base Stone); Anthropogenic (Decoration)

Gneiss

Gneiss (High-grade metamorphic rock)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sodalite

Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)

Arfvedsonite in Quartz (also labeled as Astrophyllite or Nuummite by collectors)

[Na][Na2][Mg4Fe2+](Si8O22)(OH)2 in SiO2

Amphibolite with Hornblende

Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)

Mica Schist

Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)

Diorite Gneiss

Foliated Diorite Gneiss

Fuchsite (Green Muscovite in Quartz)

K(Al,Cr)2(AlSi3O10)(OH)2 - Chromium-rich Muscovite

Vesicular Basalt

Vesicular Basalt (rich in silicate minerals mostly Plagioclase and Pyroxene)

Basalt (River Pebble)

Basalt

Greenschist (Greenstone River Pebble)

Greenschist (Chlorite Schist)

Pink Granite (Fragment)

Pink Granite (dominated by Potassium Feldspar: KAlSi3O8)

Basalt with Weathered Rind

Basalt (Aphanitic Mafic Igneous Rock)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Basalt

Mafic volcanic rock, primarily composed of Plagioclase, Pyroxene, and Olivine

Granite

Felsic Plutonic Rock (primarily SiO2, Al2O3, K2O, Na2O)

Vesicular Basalt

Vesicular Basalt (Aphanitic Mafic Rock)

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Garnet-Mica Schist

Garnetiferous Porphyroblastic Schist

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Basalt with Quartz/Epidote Vein

Mafic volcanic rock (formula primarily (Mg, Fe)2SiO4 and CaAl2Si2O8)

Yellow Sapphire or Citrine

Al2O3 (Corundum) or SiO2 (Quartz)

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Green Calcite

Calcium Carbonate (CaCO3)

Gneiss

Gneiss

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Greenstone / Epidosite

Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)

Moss Agate

Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Gneiss

Gneiss

Gneiss

High-grade metamorphic rock (Gneiss)

Slate

Phyllo-silicate based metamorphic rock

Anthracite Coal

Anthracite (Carbon-based metamorphic rock)

Gneiss

Gneiss

Mica Schist

Schist (Crystalline metamorphic rock)

Jasper Pebble

Tumbled Jasper (Microcrystalline Quartz, SiO2)

Zebra Jasper

Silicon Dioxide (SiO2) with various inclusions

Jasper

Jasper (Silicon Dioxide, SiO2)

Porphyritic Basalt

Porphyritic Basalt (Mafic extrusive rock)