Use Polarized Lighting Techniques to Capture Cool Color Effects

Gypsum Crystals

By , 02/22/2017 @ 9:28 am= | Full size is 800 × 627 pixels

  • Date Taken: 04-Feb-2017 14:21:28
  • Copyright: Ted-Kinsman
  • Credit: Ted-Kinsman
  • Title: Gypsum Crystals
  • Caption: Gypsum. Polarized light micrograph of a thin section of gypsum. Gypsum is a chemical sedimentary rock, composed mainly of hydrated calcium sulphate. It may grow as a crystal aggregate (as here) or in giant tabular crystals up to 1 meter in length. Gypsum is used in plaster of Paris, in Portland cement and as a flux in pottery. The most compact form of gypsum is known as alabaster. Sample collected in Penfield, New York. Object size: 40 mm.
  • Camera: Canon EOS 5D Mark III
  • Focal Length: 105mm
  • Aperture: f/6.3
  • ISO: 200

Sophia is the managing editor of the Make: blog. When she’s not greasing editorial gears, she likes to run, ride, climb, and lift things, and make lo-tech goods like zines, desserts, and altered clothing. @sophiuhcamille

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