Zircon
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This zircon from Madagascar shows growth trails made up of tiny particles. They look like tracks in the center of the photograph. - Photo by John I. Koivula/GIA
It might look like a sea creature, but this is actually a small crack in a zircon from Thailand. - Photo by John I. Koivula/GIA
These intersecting parallel lines show the growth pattern of a zircon from Sri Lanka. - Photo by John I. Koivula/GIA
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