A unique fingerprint or identifier is desirable for various sorts of applications such as tracking a specific product, object or preventing forgery. Furthermore, these nanodiamonds can serve also as unique fingerprints for specific organelles in cells due to their biocompatibility, low toxicity, and unique optical properties. In addition, this unique fingerprint can be suitable to tag merchandise, clothes, etc. (as the RFID technology), be used as a QR code, and tag and monitor weapons to prevent leakage to illegal markets. The NDs’ origin can also be verified as manufacturers can test the unique fingerprint of the ND batch. This has important applications in the verification of international shipping components, long-haul cargo, and electronics.