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 crystals,
gems and minerals
gems & minerals F - H
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Fluorite - yellow
Location: Cave In Rock, Illinois
Vitreous colorless green, blue, yellow, purple, pink, etc.
Chemical Composition: CaF2, Calcium Fluoride with small amounts of
yttrium and cerium
Hardness: 4
Learn more about fluorite! |
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Fuchsite
Location: Brazil
Variety of: Muscovite
Chemical Composition: KAl2(AlSi3O10)(F, OH)2,
Potassium aluminum silicate hydroxide fluoride
Hardness: 2 - 3 |
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Velvet
Goethite
Location: Mexico
Chemical Composition: FeO(OH), Hydrated Iron
Oxide
Hardness: 5 - 5.5 |
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Grossularite Garnet
Location: Sierra de Cruces, Coahuila, Mexico
General garnet composition: A3B2(SiO4)3,
where Ca, Mg, Fe2+, or Mn2+ occupy the A
site, and the B site contains Al, Fe3+ or
Cr3+. Hydrous garnets may contain up to 8.5%
H2O.
Hardness: 6.5 - 7.5
Learn more about Garnet! |
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Halite
Location: California
Vitreous pink, colorless, white, yellow,
red, blue, and purple.
Chemical Composition: NaCl, Sodium Chloride
Hardness: 2 |
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Harlequin
quartz spheres
(see also Red Quartz)
This is quartz with hematite.
Chemical Composition: SiO2 and Fe2O3
Hardness: 7 |
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Heliodor
Golden Beryl
Location: Russia
Variety of: Beryl
Chemical Composition: Be3 Al2 Si6 O18
Hardness: 7.5 - 8 |
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Herkimer
Diamond
Location: NY USA
Variety of: Quartz
Chemical composition: SiO2, silicon
dioxide
Hardness: 7
Herkimer Diamond is a doubly terminated
quartz crystal in its original form as
facetted by nature. The best crystals with
high brilliance, clarity, and surface
luster approach a real diamond in
appearance. Having originally been found
in Little Falls, Herkimer County, NY
determined the name. |
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Hübnerite
Location: Pasto Bueno, Peru
Chemical Composition: MnWO4, Manganese
tungstate
Hardness: 4 - 4.5 |
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