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How to Repair Broken Fossil Turtle Shells

Fossils are not forever. Museum specimens usually require preparation and repair before they are ready for display. Whole bones or impressions are very rare finds in the paleontology world; knowing how to piece together the broken bits is a necessity.

Things You'll Need

Adhesive
Adhesive applicators
Work table

Instructions

- 1
  Check the fossil for major breaks. Sort the pieces so that each shell's parts are together.
- 2
  Take the pieces of the turtle-shell fossil to a work table located either outside or in a well-ventilated area. Many types of adhesives give off toxic fumes. Arrange the pieces so they fit together, much like a jigsaw puzzle.
- 3
  Choose your adhesive. The two most common types of fossil repair glue are polyvinyl butyral and acrylic polymers. Both of these are reversible glues, which is a positive for fossil repair.
- 4
  Apply the adhesive along one side of the crack. These adhesives do not dry immediately. Use the appropriate applicator; a wooden or flat-metal applicator is preferred. Do not use a cotton swab, because the fibers detach and stick to the fossil. Use only enough adhesive to line one side of the crack without spillage or dripping.
- 5
  Carefully press together the separated pieces; align the breakage points precisely for the best fit. Fit the fossil between sturdy pieces of wood to assure that it stays put during hardening. The adhesive is completely dry in 12 hours.

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