Sedimentary (Secondary Mineral) Within Igneous

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Greenstone Pebble

Metabasalt / Greenschist

Prehnite with Epidote

Prehnite (Ca2Al(AlSi3O10)(OH)2) with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Quartz / Quartz Geode fragment

Silicon Dioxide (SiO2)

Epidote-bearing Rock / Epidote Inclusion

Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) in host rock

Rose Quartz

Rose Quartz (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Limonite

FeO(OH)•nH2O

Limonite or Goethite (Ironstone)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Kaolinite (China Clay)

Kaolinite (Al2Si2O5(OH)4)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Milky Quartz with Iron Oxides

Silicon Dioxide (SiO2) with Fe2O3 inclusions

Granitic Gneiss

Gneiss (Metamorphic rock predominantly containing quartz, K-feldspar, and plagioclase)

Limonite with Galena

FeO(OH)·nH2O (Limonite) and PbS (Galena)

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Quartz

Silicon Dioxide (SiO2)

Turquoise

Hydrous phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Gneiss

Gneiss (foliated metamorphic rock)

Quartz Pebble (Geode Nodules / Stream-Rounded Quartz)

Silicon Dioxide (SiO2)

Gneiss (with Garnet)

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

Blue-dyed Quartz Druzy

Silicon Dioxide (SiO2) with artificial pigment

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Limonite (Ironstone)

Goethite/Limonite (Hydrated iron(III) oxide-hydroxide)

Gneiss

Gneiss

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

Chrysocolla

Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Agate Geode

Silicon Dioxide (SiO2) - variety Chalcedony/Quartz

Quartz (Iron-stained or Milky)

Silicon Dioxide (SiO2)

Limonite / Goethite (Iron Ore Mineral nodule)

FeO(OH)·nH2O / FeO(OH)

Gneiss

Gneiss (Foliated Metamorphic Rock)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Druzy/Macro-crystalline)

Silicon Dioxide (SiO2)

Copper slag or vesicular basalt with copper minerals

Industrial slag / Basaltic matrix with secondary copper minerals

Dalmatian Jasper

Peralkaline Quartz Feldspar Porphyry

Gneiss

Gneiss

Chrysocolla in Quartz (Gem Silica)

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / SiO2 (Quartz)

Limonite with Quartz

Hydrated Iron Oxide Hydroxide with Silicon Dioxide (FeO(OH)·nH2O + SiO2)

Botryoidal Agate / Chalcedony Geode

Silicon Dioxide (SiO2)