Now a bit larger for better printing - but for a smooth surface I still recommend a "Precious Metal'.
Photo shows (smaller version) in Gold Steel, the up to date version is still a bit smaller than an ordinary key :
Please check out all our awesome molecules:
Caffeine Necklace
THC Necklace
THC Keychain or Pendant
Dopamine
Serotonin
Water Molecule
Buckyball Pendant