Minerals

Botryoidal Hematite (Iron Stone Conglomerate)

Hematite (Fe2O3) in sedimentary matrix

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Gneiss

Gneiss

Turquoise and Hematite

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)

Blue Topaz

Al2SiO4(F,OH)2

Quartz Pebble

Silicon Dioxide (SiO2)

Diorite

Plutonic Igneous Rock (NaAlSi3O8, CaAl2Si2O8)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Greenstone / altered basalt (probable)

Chlorite–epidote–actinolite aggregate; commonly metabasalt (greenstone)

Limonite/Goethite Concretion

Goethite (FeO(OH))

Granitic Gneiss

Gneiss (high-grade metamorphic rock)

Quartz Vein Rock

Silicon dioxide (SiO2) within a host rock matrix

Chakra Crystal Bracelet

Mixed Mineral Assortment

Green serpentine-rich rock (probable nephrite/jade-like specimen)

Serpentinite, chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄); possibly minor nephrite amphibole

Limonite

FeO(OH)•nH2O

Vein-bearing metamorphic rock, likely gneiss or schist

Banded silicate rock; likely quartz–feldspar–mica gneiss with a quartz vein

Galena

Lead Sulfide (PbS)

Greenstone (Amygdaloidal Basalt)

Amygdaloidal Basalt (frequently composed of Plagioclase Feldspar, Pyroxene, and Olivine with Chlorite inclusions)

Banded serpentine (likely antigorite-rich serpentinite)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnesite/talc

Limonite / Ironstone

Hydrated Iron Oxide (FeO(OH)·nH2O)

Quartz (Milky or Yellow/Citrine Quartz)

Silicon Dioxide (SiO2)

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Gneiss

Gneiss (Metamorphic high-grade)

Weathered foliated metamorphic rock, likely schist or gneiss

Micaceous quartz–feldspar metamorphic rock; exact mineralogy requires testing

Gneiss

Gneiss

Green Slate or Metamorphic Rock

Metamorphic rock (chlorite/actinolite-bearing)

Gneiss

Gneiss (High-grade metamorphic rock)

Granite

Intrusive Igneous Rock

Pale green rounded boulder, likely altered serpentinite or greenstone

Probable serpentinized ultramafic rock; exact identification requires testing

Quartz Pebble

Silicon Dioxide (SiO2)

Tumbled pale greenish stone, likely serpentine or altered limestone

Probable serpentine-group rock (antigorite/lizardite), possibly serpentinite; identification is visual only

Dark weathered igneous rock, likely basalt

Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine or iron oxides

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz with inclusions

Silicon Dioxide (SiO2)

Sand Grain (Silica/Quartz Grain)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt with Quartz/Zeolite Inclusions

Porphyritic Basalt (SiO2 with Aluminosilicates)

Chatoyant Quartz (Cat's Eye Quartz)

Silicon Dioxide (SiO2) with fibrous inclusions of Amphibole or Rutile

Quartz Vein Rock with Feldspar

Silicon Dioxide (SiO2) with Potassium Feldspar