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We here at molarchae love streaking! The microbiological kind of streaking, I mean. Streak plates are used to isolate pure strains of microbes from mixed samples. The inoculum is spread over the growth medium in the petri dish in one section, and then spread increasingly thinly around the plate. When the microbes are dilute enough to not run into each other, individual strains can be isolated.

Made from a vintage book cover as part of our BOOK collection, the centerpiece of this necklace is a laser cut streak plate (1.25" diameter).

This necklace is made to order! For this listing, unless you specify otherwise, you'll get a 16" necklace with silver finish chain and a random choice of color.

Length: 16" chain or 18" chain
Chain: bright silver or gunmetal finish
Color: see photos, use drop-down menu for available colorss. If we don't have the color you want on hand, we'll let you know if we can make it.

PLEASE NOTE: These pieces do not respond well to water! We don't advise wearing while dancing in the rain, swimming, or working with chemicals likely to result in needing emergency eyewash or shower.

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Molarchae's BOOK collection melds together our love of science, creativity, and reuse. Science is an ever-evolving body of knowledge, and as a result, many older books are almost laughably outdated. We take books that are past their informative or physical prime and give them a new life with the help of a laser cutter and a lot of love. Because every old book has history and character, each piece is guaranteed unique. The laser etching removes the top layer of the cover to reveal the fabric or chip board underneath, resulting in the two-tone effect. Many of these books also have truly fantastic cover designs that we wanted to give a better life than sitting on a shelf--and so BOOK was born. Yay science!

Petri dish -- laser etched book cover necklace -- science geekery


  • Handmade item
  • Color: Mustard
  • Materials: book cover, science
  • Made to order
  • Only ships to United States from California, United States.
  • Feedback: 76 reviews
  • Favorited by: 11 people