Herkimer "diamond" (variety of quartz)

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- Actinolite
- Adamite
- Agate
- Albite
- Altaite
- Amazonite
- Amber
- Amethyst
- Ametrine
- Ammonite
- Apatite
- Apophyllite
- Aquamarine
- Aragonite
- Aura Quartz
- Aurichalcite
- Austinite
- Aventurine
- Azurite
- Baker Geodes
- Barite
- Beryl
- Black Tourmaline (Schorl)
- Bloodstone
- Brochantite
- Brucite
- Calcite
- Carnelian
- Cassiterite
- Celestite
- Cerussite
- Chabazite
- Chalcedony
- Chalcopyrite
- Charoite
- Chiastolite
- Chrome Diopside
- Chrysocolla
- Citrine
- Columbite
- Conichalcite
- Copper
- Covellite
- Cuprite
- Danburite
- Descloisite
- Dinosaur Bone (fossil)
- Dioptase
- Dolomite
- Dumortierite
- Emerald
- Erythrite
- Epidote
- Feldspar
- Fluorite
- Fossil Coral
- Fossil Sand Dollar
- Fossil Sea Urchin
- Fossil Shells
- Fossil Shrimp
- Franklinite
- Fuchsite
- Fulgurite (Lechatelierite)
- Galena
- Garnet
- Geodes
- Goethite
- Gypsum
- Halite
- Hematite
- Hemimorphite
- Herkimer "diamond"
- Heulandite
- Holmquistite
- Iolite
- Jade, Nephrite, and Jadeite
- Jasper
- Jet
- Kyanite
- Labradorite
- Lapis Lazuli
- Larimar
- Lemurian quartz
- Lepidolite
- Libyan Desert Glass
- Linarite
- Lithium Quartz
- Magnetite
- Malachite
- Mesolite
- Meteorite
- Microcline
- Mimetite
- Moldavite
- Moonstone
- Moqui Balls
- Mordenite
- Morganite
- Mottramite
- Muscovite
- Obsidian
- Olivine
- Onyx
- Opal
- Orpiment
- Orthoclase
- Pearl
- Peridot
- Petrified Wood (fossil)
- Phlogopite
- Piemontite
- Pietersite
- Pinolith
- Planerite
- Prasiolite
- Prehnite
- Pyrite
- Quartz
- Rhodochrocite
- Rhodonite
- Ricardite
- Rosasite
- Rose Quartz
- Ruby
- Ruby in Zoisite (Anyolite)
- Sapphire
- Scolecite
- Schorl (Black Tourmaline)
- Selenite
- Seraphinite
- Serpentine
- Shiva Lingham
- Shungite
- Smithsonite
- Smoky Quartz
- Sodalite
- Sphalerite
- Spinel
- Staurolite
- Stibnite
- Stichtite
- Stilbite
- Stromatolite (fossil)
- Sturmanite
- Sunstone
- Super 7
- Tanzanite
- Thulite
- Tiffany Stone
- Tigers Eye
- Trilobite (fossil)
- Topaz
- Tourmaline
- Turquoise
- Unakite
- Vanadinite
- Variscite
- Vesuvianite
- Volborthite
- Wavellite
- Wulfenite
- Yooperlite
- Zeolites
- Zoisite
- Uralite
Mineral formula: SiO2
Mineral group: member of the silicate group
Crystal system: trigonal
Crystal habit: prismatic with numerous habits in additional to the “normal” six-sided one.
Cleavage: none
Fracture: conchoidal
Color: clear, sometimes with black/dark grey carbonaceous inclusions
Luster: adamantine to vitreous
Diaphaneity: transparent
Moh’s scale hardness: 7
Streak: none (harder than streak plate)
Specific gravity: 2.65 – 2.66
Named after: the type locality, Herkimer County, New York. It was called “diamond” due to the unusually lustrous, adamantine luster of these crystals. They were originally (1790) named "Little Falls Diamond(s)"
Type locality: Herkimer County, New York
Geological occurrence: clear and highly lustrous, quartz crystals from cavities in dolostones in Herkimer Co., New York, and surrounding areas, USA. They are frequently doubly terminated with prism faces about as prominent as the pyramidal terminations. This type of quartz forms under low-temperature hydrothermal conditions in sedimentary rocks and often contain hydrocarbon inclusions.
Energetic properties: Working with Herkimer quartz is like working with regular quartz, on steroids; some consider them to the most powerful of all quartz crystals.
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- New Mexico Geology
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- Birthstones
- Geologic Time Scale
- Mohs Scale of Mineral Hardness
- Chakras
- Southwest Gem/ Mineral/ Rock Clubs
- Taos Rockers' Gem Safari
- Size Chart
- About
- Actinolite
- Adamite
- Agate
- Albite
- Altaite
- Amazonite
- Amber
- Amethyst
- Ametrine
- Ammonite
- Apatite
- Apophyllite
- Aquamarine
- Aragonite
- Aura Quartz
- Aurichalcite
- Austinite
- Aventurine
- Azurite
- Baker Geodes
- Barite
- Beryl
- Black Tourmaline (Schorl)
- Bloodstone
- Brochantite
- Brucite
- Calcite
- Carnelian
- Cassiterite
- Celestite
- Cerussite
- Chabazite
- Chalcedony
- Chalcopyrite
- Charoite
- Chiastolite
- Chrome Diopside
- Chrysocolla
- Citrine
- Columbite
- Conichalcite
- Copper
- Covellite
- Cuprite
- Danburite
- Descloisite
- Dinosaur Bone (fossil)
- Dioptase
- Dolomite
- Dumortierite
- Emerald
- Erythrite
- Epidote
- Feldspar
- Fluorite
- Fossil Coral
- Fossil Sand Dollar
- Fossil Sea Urchin
- Fossil Shells
- Fossil Shrimp
- Franklinite
- Fuchsite
- Fulgurite (Lechatelierite)
- Galena
- Garnet
- Geodes
- Goethite
- Gypsum
- Halite
- Hematite
- Hemimorphite
- Herkimer "diamond"
- Heulandite
- Holmquistite
- Iolite
- Jade, Nephrite, and Jadeite
- Jasper
- Jet
- Kyanite
- Labradorite
- Lapis Lazuli
- Larimar
- Lemurian quartz
- Lepidolite
- Libyan Desert Glass
- Linarite
- Lithium Quartz
- Magnetite
- Malachite
- Mesolite
- Meteorite
- Microcline
- Mimetite
- Moldavite
- Moonstone
- Moqui Balls
- Mordenite
- Morganite
- Mottramite
- Muscovite
- Obsidian
- Olivine
- Onyx
- Opal
- Orpiment
- Orthoclase
- Pearl
- Peridot
- Petrified Wood (fossil)
- Phlogopite
- Piemontite
- Pietersite
- Pinolith
- Planerite
- Prasiolite
- Prehnite
- Pyrite
- Quartz
- Rhodochrocite
- Rhodonite
- Ricardite
- Rosasite
- Rose Quartz
- Ruby
- Ruby in Zoisite (Anyolite)
- Sapphire
- Scolecite
- Schorl (Black Tourmaline)
- Selenite
- Seraphinite
- Serpentine
- Shiva Lingham
- Shungite
- Smithsonite
- Smoky Quartz
- Sodalite
- Sphalerite
- Spinel
- Staurolite
- Stibnite
- Stichtite
- Stilbite
- Stromatolite (fossil)
- Sturmanite
- Sunstone
- Super 7
- Tanzanite
- Thulite
- Tiffany Stone
- Tigers Eye
- Trilobite (fossil)
- Topaz
- Tourmaline
- Turquoise
- Unakite
- Vanadinite
- Variscite
- Vesuvianite
- Volborthite
- Wavellite
- Wulfenite
- Yooperlite
- Zeolites
- Zoisite
- Uralite
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- Shop
- New
- New Mexico Minerals
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- Sets & Kits
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- Minerals & Fossils
- Shop Minerals & Fossils
- Mineral & Fossil Info
- Minerals & Fossils by State (USA)
- Minerals & Fossils by Country
- About Fossils
- Discover
- New Mexico Geology
- The Geo-Nerd News
- The Taos Rockers Newsletter
- Birthstones
- Geologic Time Scale
- Mohs Scale of Mineral Hardness
- Chakras
- Southwest Gem/ Mineral/ Rock Clubs
- Taos Rockers' Gem Safari
- Size Chart
- About
- Actinolite
- Adamite
- Agate
- Albite
- Altaite
- Amazonite
- Amber
- Amethyst
- Ametrine
- Ammonite
- Apatite
- Apophyllite
- Aquamarine
- Aragonite
- Aura Quartz
- Aurichalcite
- Austinite
- Aventurine
- Azurite
- Baker Geodes
- Barite
- Beryl
- Black Tourmaline (Schorl)
- Bloodstone
- Brochantite
- Brucite
- Calcite
- Carnelian
- Cassiterite
- Celestite
- Cerussite
- Chabazite
- Chalcedony
- Chalcopyrite
- Charoite
- Chiastolite
- Chrome Diopside
- Chrysocolla
- Citrine
- Columbite
- Conichalcite
- Copper
- Covellite
- Cuprite
- Danburite
- Descloisite
- Dinosaur Bone (fossil)
- Dioptase
- Dolomite
- Dumortierite
- Emerald
- Erythrite
- Epidote
- Feldspar
- Fluorite
- Fossil Coral
- Fossil Sand Dollar
- Fossil Sea Urchin
- Fossil Shells
- Fossil Shrimp
- Franklinite
- Fuchsite
- Fulgurite (Lechatelierite)
- Galena
- Garnet
- Geodes
- Goethite
- Gypsum
- Halite
- Hematite
- Hemimorphite
- Herkimer "diamond"
- Heulandite
- Holmquistite
- Iolite
- Jade, Nephrite, and Jadeite
- Jasper
- Jet
- Kyanite
- Labradorite
- Lapis Lazuli
- Larimar
- Lemurian quartz
- Lepidolite
- Libyan Desert Glass
- Linarite
- Lithium Quartz
- Magnetite
- Malachite
- Mesolite
- Meteorite
- Microcline
- Mimetite
- Moldavite
- Moonstone
- Moqui Balls
- Mordenite
- Morganite
- Mottramite
- Muscovite
- Obsidian
- Olivine
- Onyx
- Opal
- Orpiment
- Orthoclase
- Pearl
- Peridot
- Petrified Wood (fossil)
- Phlogopite
- Piemontite
- Pietersite
- Pinolith
- Planerite
- Prasiolite
- Prehnite
- Pyrite
- Quartz
- Rhodochrocite
- Rhodonite
- Ricardite
- Rosasite
- Rose Quartz
- Ruby
- Ruby in Zoisite (Anyolite)
- Sapphire
- Scolecite
- Schorl (Black Tourmaline)
- Selenite
- Seraphinite
- Serpentine
- Shiva Lingham
- Shungite
- Smithsonite
- Smoky Quartz
- Sodalite
- Sphalerite
- Spinel
- Staurolite
- Stibnite
- Stichtite
- Stilbite
- Stromatolite (fossil)
- Sturmanite
- Sunstone
- Super 7
- Tanzanite
- Thulite
- Tiffany Stone
- Tigers Eye
- Trilobite (fossil)
- Topaz
- Tourmaline
- Turquoise
- Unakite
- Vanadinite
- Variscite
- Vesuvianite
- Volborthite
- Wavellite
- Wulfenite
- Yooperlite
- Zeolites
- Zoisite
- Uralite