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Hydrated iron oxide

  • Chemistry: A mixture of hydrated iron oxides
  • Uses: Important ore of iron, as a pigment and as mineral specimens.
Limonite is not a true mineral but a mixture of similar hydrated iron oxide minerals. Most of limonite is made up of . Massive Goethite and Limonite can be indistinguishable. Limonite forms mostly in or near oxidized iron and other metal ore deposits, and as sedimentary beds. Limonite has been known to pseudomorph other minerals such as, meaning it replaces a crystal of pyrite with limonite but keeps the shape of the pyrite crystal.


  • Color is yellow, orange, reddish brown, brownish black.
  • Luster is earthy to dull.
  • Transparency is opaque.
  • Crystal System is undefined.
  • Crystal Habits include massive, layered, botryoidal and stalactitic.
  • Cleavage is absent.
  • Fracture is crumbly or earthy.
  • Hardness is variable 4 - 5.5
  • Specific Gravity is variable at 2.9 to 4.3 (average to above average)
  • Streak is brownish yellow to yellow.
  • Associated Minerals include a large list of minerals particularly secondary deposit minerals.
  • Notable Occurrences include many iron mines around the world, especially nice specimens come from Europe, Mexico, Canada and northeastern USA.
  • Best Field Indicators are lack of crystal forms, lack of cleavage and streak.
Read electro-mechanical engineering blog
Electrospun poly(ethylene oxide)/hydrated iron oxide/sodium alginate composite nanofibers with multi-functional properties.(Report): An article from: Polymer Engineering and Science
Book (Society of Plastics Engineers, Inc.)
Capital Ceramics Yellow Ochre High Iron Clay or Hydrated Ferric Oxide 1 LB Bag Capital Ceramics
Art and Craft Supply (Capital Ceramics)
  • Natural clay material containing yellow iron oxide used in ceramic arts and clay formulations
  • Colorant to produce iron tan, yellow and re-brown in slips and glazes.
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Loudwolf Industrial & Scientific Iron Oxide / Yellow 44 Micron Powder / 4 Ounces / 99% Pure / SHIPS FAST FROM USA
Art and Craft Supply (Loudwolf Industrial & Scientific)
  • TOTAL VOLUME OF BOTTLE: 4 Fluid Ounces
  • TEXTURE: Fine Powder (44 Microns)
  • GRADE: 99% Pure Reagent Grade
  • CAS #: 51274-00-1
R&F Handmade Paints R&F Pigment Sticks, 38ml, Mars Yellow Light
Art and Craft Supply (R&F Handmade Paints)
  • Handmade in the usa
  • Pigment sticks are high quality oil paint with just enough natural wax added to maintain a solid stick form
  • Contains hydrated iron oxide, precipitated
  • Conforms to ASTM D-4236
Sponge Me Konjac with " French Red Clay " a fabulous Deep Cleansing, Gentle Exfoliating Facial Sponge. Perfect for the dryer or more mature skin types yet Rich in Trace elements, it helps give a Glow to the Face and Brightens dull Complexions for All Skin Types
Baby Product (Sponge Me)
  • Sponge Me with French Red Clay is a fabulous deep cleansing, gentle exfoliating facial sponge.
  • Perfect for the dryer or more mature skin types yet rich in trace elements, it helps give a glow to the face and brightens dull complexions for all skin types.
  • Loaded with Iron Oxide, Red clay cleans out the skin from the layers of dead keratinized cells and accelerates the regeneration process.
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