If you want exotic jewelry, you’ve come to the right place! The Neutronium Necklace has a classic thick-link sterling-silver chain with a striking pendant containing a 26,000,000,000,000-carat brilliant-cut crystal of virgin neutronium, imported directly from J0108.

Care instructions: The pendant’s gravity may attract small objects such as crumbs, grains of sand, and loose paperclips. As the jewel is harder than all known materials, it may be cleaned with a damp cloth, sandblaster, waterjet cutter, high-power laser, or with high explosives. Its setting, however, is sterling silver, and so it should be cleaned separately with a suitable silver polish.

Safety instructions: For your safety, we do not recommend you touch the jewel with bare hands, as tidal forces may cause discomfort, dislocation, or dismemberment. We also strongly recommend against wearing the neutronium necklace in Earth gravity, as its weight will exceed 500,000 tonnes, which may result in neck or back injury or decapitation. For your own safety, and the safety of others, please avoid dropping the necklace, as the jewel will rapidly penetrate the Earth’s crust and be lost. In this situation, the necklace’s warranty will not cover the cost of replacement.

Please note that neutronium is not stable at pressures below 100 megaelectronvolts per cubic femtometer. Exposing the jewel to ambient pressures below this level will void the necklace’s warranty, and may result in a Solar-system threatening explosion exceeding 10 trillion megatons.

Note: As a precaution against theft, black-market resale, and usage by supervillains, demons, or malevolent alien lifeforms, your neutronium jewel is inscribed with an inconspicuous barcode on its rear side. If you wish to have the jewel re-set, please only consult a licensed jeweler who has been certified Not an Evil Psychopath.

Fair Trade Certification: The rough neutronium crystal in your Neutronium Necklace was purchased at fair market value from the neutron-worms of J0108. Mining conditions are certified humane by the RL Forward observatory committee. Please direct all concerns to the RL Forward committee, as the neutron-worms are only capable of communicating via high-energy neutrino beams, which may present a health hazard to untrained civilians.