Jewel Kryptonite
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Jewel Kryptonite
Jewel Kryptonite is crystalline material from Krypton's Jewel Mountains (also, see Jax-Ur). While Superman discounts it as unlike other Kryptonite in not directly affecting him (or other surviving Kryptonians) as he hurls a chunk of Jewel Kryptonite into the sun, it does have the power to focus thoughts from residents of the Phantom Zone and explode combustible materials. The accounts are unclear if only Kryptonian Phantom Zone prisoners have the ability to employ this strange Kryptonite in this manner (Act No. 310, Mar 1964: "Secret of Kryptonite Six!"). Since Jewel Kryptonite in the chronicles is taken from Krypton's past, and unaltered by the explosion of Krypton, it may not have any radioactive properties.
