Acrylic crystal used by Rodney McKay to disable the Attero device in the Atlantis Season Five episode, "The Lost Tribe". Measures 3in x 1.5in x .25in.

Control crystal used by actor David Hewlett as "Rodney McKay" in the Stargate Atlantis Season Five episode, "The Lost Tribe". McKay and Daniel Jackson entered the chamber where the device was active, and removed this crystal from its core to disable it.

Production-made clear acrylic panel cut into geometric shapes with geometric shaped holes and etched simulated circuitry, measures approx. 3in x 1.5in x .25in.

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