Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Mineral (Specifically A Mineraloid)
Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Rough Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Bicolor Tanzanite
Zoisite (Ca2Al3(SiO4)3(OH))
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral
Amethyst (specifically Chevron Amethyst or Dream Amethyst)
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Fossil Shark Tooth (Otodus obliquus)
Otodus obliquus; hydroxyapatite (mineralized form Ca5(PO4)3(OH))
sedimentary (fossiliferous)
Green Moss Agate
Agate (Silicon Dioxide - SiO2) with inclusions of hornblende or chlorite
mineral
Basalt with Epidote Veins
Mafic Igneous Rock (Basalt)
igneous
Fossilized Angel Wing Shell
Cyrtopleura costata
sedimentary
Amber
Succinite
Organic Mineraloid
Amber
Succinite (with empirical formula approximately C10H16O)
Organic Mineraloid
Basalt River Stone
Basalt (Mafic volcanic rock, primarily Plagioclase and Pyroxene)
igneous
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
mineral
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Amber
Succinite
Organic mineraloid
Granite
Phaneritic plutonic rock (approx. 20-60% quartz, 35-90% feldspar)
igneous
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Pegmatite (Granitic)
Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)
igneous
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Granite (specifically Pink or Alkali Feldspar Granite)
Felsic Plutonic Rock (primarily SiO2 with KAlSi3O8)
igneous
Fancy Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - Variety: Chalcedony
mineral
Labradorite (Feldspar)
Labradorite: (Ca,Na)(Al,Si)4O8
mineral
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
mineral
Green Aventurine
Quartz (Silicon Dioxide) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Green Quartzite (Aventurine-like)
Quartzite (primarily SiO2 with chromium-rich mica or chlorite inclusions)
metamorphic
Banded Agate with Druzy Quartz
Agate (Silicon Dioxide - SiO2)
mineral
Mookaite Jasper
Silicified Radiolarite (Silicon Dioxide: SiO2)
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Mineral
Agate (specifically Lake Superior Agate style or Banded Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Turquoise (Rough Specimens)
Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
mineral
Rough Quartz in Pegmatite Matrix
Quartz (Silicon Dioxide - SiO2) in Granitic Pegmatite
igneous
Marble
Recrystallized Calcite (CaCO3) Rock
metamorphic
Citrine (Yellow Quartz)
Silicon Dioxide (SiO2)
Mineral
Milky Quartz in Matrix
Silicon Dioxide (SiO2)
mineral