Korea’s Coinone Launches Physical Cryptocurrency Exchange (news.bitcoin.com)

Korea’s third largest bitcoin exchange Coinone has opened a physical cryptocurrency exchange. Six cryptocurrencies are supported including bitcoin, bitcoin cash, and ether. The complex has a bitcoin ATM, a large display board with market information and features a face-to-face consultation service.
Also read: South Korea Takes

Bitcoin

What physical coins of bitcoin exists?

Whenever a news article is written about bitcoin, it has this “physical” gold/brass coin with detailed circuitry on it as an article picture.

For examples see here and here.

Does this really exists? Who makes them and where can I buy one? Is it from gold? I am specifically interested in the coin with this “detailed circuitry” like the two on the pictures I linked. I was able to find some sellers of physical coins, but they are not as detailed/precise.

What other physical coins “of bitcoin” exist?

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Physical objects on the blockchain as data?

I have been wondering about the company that stores diamonds via the Blockchain using it as a ledger to follow each diamond individually from where it is mined through the world. Each diamond has a unique ‘passport’ and so it is impossible for it to get lost or for it to enter the black market. Can anybody explain to me how this works in terms of how the information about the diamond is broken into categories in order for it to be fully described. Also, does a physical ‘passport’ travel with each diamond everywhere? Are these stored on a specific blockchain designed particularly for the diamonds?

Thanks

Recent Questions – Bitcoin Stack Exchange