Mineral (Tectosilicate)

Amethyst

Amethyst (variety of Quartz, SiO2)

Ferruginous Quartz (Iron-Stained Quartz)

Quartz (Silicon Dioxide) with Iron Oxide inclusions (SiO2 + Fe2O3)

White Quartz Pebble

Silicon Dioxide (SiO2)

Amethyst (Tumbled)

Silicon Dioxide with iron impurities (SiO2)

Iolite (Cordierite)

Cordierite (Magnesium Aluminum Silicate), Mg2Al4Si5O18

Blue Topaz

Al2SiO4(F,OH)2 (Fluorine-bearing aluminum silicate)

Smoky Quartz (with Druzy/Polished Edge)

Smoky Quartz (Silicon Dioxide, SiO2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Almandine Garnet

Almandine [Fe3Al2(SiO4)3]

Garnet (likely Almandine)

Almandine (Fe3Al2(SiO4)3)

Rhodonite in Quartz Matrix

Rhodonite (Manganese Silicate - (Mn,Fe,Mg,Ca)SiO3)

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

Desert Rose (Gypsum Rose)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Rutilated Quartz (or Tourmalinated Quartz if inclusions are Tourmaline)

Silicon Dioxide (SiO2) with Rutile (TiO2) or Tourmaline inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Garnet (almandine or pyrope variety)

Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3

Labradorite (tumbled)

Labradorite (a plagioclase feldspar mineral between anorthite and albite; chemical formula: (Ca,Na)(Si,Al)4O8)

Olivine (likely Peridot variety)

Olivine Mineral Group (specifically Forsterite-Fayalite solid solution series); Chemical formula: (Mg,Fe)2SiO4

Amber

Fossilized tree resin (not a true mineral as it is organic and amorphous); Chemical formula is highly variable, but often approximated as C10H16O.

Rhodonite

Rhodonite; (Mn,Fe,Mg,Ca)SiO3

Dalmation Stone (Dyed)

Peralkaline rhyolite

Amygdaloidal Basalt

Amygdaloidal Basalt (extrusive volcanic rock)

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Rose Quartz

Silicon Dioxide (SiO2)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Pumice or Tufa/Travertine

Pumice (if igneous) or Calcareous Tufa (if sedimentary)

Silver (Native Silver)

Native Silver (Ag)

Seraphinite (Clinochlore)

Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8

Rose Quartz

Quartz (Silicon Dioxide, SiO2)

Gold

Gold (Au)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sunstone (variety of Feldspar)

Oligoclase Sunstone, Plagioclase Feldspar (Na,Ca)Al(Si,Al)Si2O8

Ruby Fuchsite / Ruby in Fuchsite

Ruby (Al2O3 variety corundum) and Fuchsite (K(Al,Cr)2AlSi3O10(OH)2 - a chromium-rich variety of muscovite mica) in Quartz matrix

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Rough Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)