A computer-implemented system is provided and includes a processor and a memory accessible by the processor, with the system being configured to measure light performance properties of a gemstone and generate an objective grade for the gemstone.

A magneto-optical defect center magnetometer, such as a diamond nitrogen vacancy (DNV) magnetometer, can include an excitation source, a magneto-optical defect center element, a collection device, a top plate, a bottom plate, and a printed circuit board. The excitation source, the magneto-optical defect center element, and the collection device are each mounted to the printed circuit board

Systems and methods here may be used for a setup of fluorescence image capturing of a gemstone, such as a diamond placed on a flat stage. Some examples utilize a setup that both sends light and captures the image from the table side of the gemstone by passing ultraviolet (UV) light between 10 nm and 400 nm to the gemstone and capturing the excited fluorescence image for analysis through a dichroic beam splitter. In some examples, the cutoff is 300 nm. The dichroic beam splitter arrangement allows for the camera to focus on the same interface of the stage and gemstone over and over for ease of use and without moving, changing, or adjusting the equipment for different samples.

Systems and methods here may be used for a setup of fluorescence image capturing of a gemstone, such as a diamond placed on a flat stage. Some examples utilize a setup that both sends light and captures the image from the table side of the gemstone by passing ultraviolet (UV) light between 10 nm and 400 nm to the gemstone and capturing the excited fluorescence image for analysis through a dichroic beam splitter. In some examples, the cutoff is 300 nm. The dichroic beam splitter arrangement allows for the camera to focus on the same interface of the stage and gemstone over and over for ease of use and without moving, changing, or adjusting the equipment for different samples.

A method to permanently mark an item of plated jewelry involves creating a laminate of two metals, and upper layer typically formed of a more precious metal such as gold, platinum and palladium that do not readily oxidize laminated onto the surface of a less precious metal, such as silver, which is oxidized to create a dark color (e.g. black). A laser is used to create characters and/or designs in the upper layer by vaporizing portions to effectively remove those portions. This exposes the upper surface of the less precious metal that does become oxidized. An oxidizer, such as liquid sulfur, is used to blacken the silver, typically a dark gray. This allows an easy and inexpensive method of archiving information on jewelry bearing or supporting a gem that describes the supported gem rendering the gem more valuable collectible and traceable.

Ring attributes may be predicted using a predictive model. A diamond selection system determines predicted ring attributes by obtaining and analyzing data related to a recipient, such as social media activity. The diamond selection system may determine search parameters based on predicted ring attributes and present a curated selection or list of candidate stones and/or settings that match the determined search parameters, for example, in a user interface of a mobile electronic device.

Ring attributes may be predicted using a predictive model. A diamond selection system determines predicted ring attributes by obtaining and analyzing data related to a recipient, such as social media activity. The diamond selection system may determine search parameters based on predicted ring attributes and present a curated selection or list of candidate stones and/or settings that match the determined search parameters, for example, in a user interface of a mobile electronic device.

A method and system for encrypting and decrypting authentication information about a synthetic Raman diamond tag formed with predetermined defects, impurities and/or strains in its crystal structure. A sender uses an optical spectrometer to establishing authentication identities of the synthetic diamond Raman tag and the sender's nature by means of Raman scanning. The sender then encrypts information about the synthetic Raman diamond tag and the sender, and transfers the Raman tag physically to a receiver and the encrypted information electronically to the receiver. The receiver first authenticates the diamond Raman tag and second authenticates the sender's nature. The receiver decrypts the encrypted information by reverse Raman scanning only if the first and second authenticating steps are successful.

A method and system for encrypting and decrypting authentication information about a synthetic Raman diamond tag formed with predetermined defects, impurities and/or strains in its crystal structure. A sender uses an optical spectrometer to establishing authentication identities of the synthetic diamond Raman tag and the sender's nature by means of Raman scanning. The sender then encrypts information about the synthetic Raman diamond tag and the sender, and transfers the Raman tag physically to a receiver and the encrypted information electronically to the receiver. The receiver first authenticates the diamond Raman tag and second authenticates the sender's nature. The receiver decrypts the encrypted information by reverse Raman scanning only if the first and second authenticating steps are successful.

A gemstone includes: a table; a culet extending in parallel to the table and having an area at least 10% of a size of an area of the table; and a treatment covering at least the culet that reflects diffused light through the gemstone.