In one embodiment, a system includes a tangible token comprising a transparent gemstone, wherein the transparent gemstone is internally etched with information pertaining to a blockchain, and the information comprises at least a private key, a public key, and an address. The system includes a computing device configured to execute instructions that cause the computing device to: read the information, and validate, via a network and the address, the public key and the private key are associated with at least one block on the blockchain.