Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a gemstone to be assessed, one or more light source to provide uniform UV and non-UV illumination, an image capturing component, and a telecentric lens positioned to provide fluorescent images of the illuminated gemstone to the image capturing component. Also provided are methods of fluorescence analysis based on images collected using such an apparatus.

The disclosure provides a method (200) for determining one or more features associated with an internal structure of a gemstone, the gemstone being at least partially transmissive to electromagnetic radiation. The method comprises directing electro-magnetic radiation towards the gemstone using a source of incident electromagnetic radiation; in response to directing electromagnetic radiation, detecting electromagnetic radiation using an optical detecting means, including detecting electromagnetic radiation following an interaction between the gemstone and the incident electromagnetic radiation; and processing the detected electromagnetic radiation, wherein the processing accounts for a determination of an external surface geometry of the gemstone and for refraction and reflection effects due to the external surface geometry of the gemstone, and obtains information indicative of the one or more features associated with the internal structure of the gemstone. A system for determining one or more features associated with an internal structure of a gemstone is also provided.

Provided herein is an apparatus for assessing a color characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a sample gemstone to be assessed, a daylight-approximating light source to provide uniform illumination to the gemstone, an image capturing component, and a telecentric lens positioned to provide an image of the illuminated gemstone to the image capturing component. Also provided are methods of color analysis based on images collected using such an apparatus.

A method of re-identifying a rough gemstone comprises providing a 3D model of a first rough gemstone; generating a series of virtual 2D silhouette images of the 3D model; processing each 2D image of the series of virtual 2D silhouette images to obtain a dataset associated with the first rough gemstone; and comparing the dataset of the first rough gemstone with an existing dataset of a rough gemstone. Where the dataset of the first rough gemstone and the existing dataset match each other, the method comprises re-identifying the first rough gemstone as the same rough gemstone from which the existing dataset was obtained.

A method for object characterization and authentication is described. In one embodiment, the method may include establishing, over a communication network, a connection between a network accessible image capturing device and a remote computing device, capturing a first image of an object using the microscope before performing an action in relation to the object, identifying a distinguishing feature of the object on the first image of the object, capturing a second image of the object using the microscope after performing the action in relation to the object, and identifying the distinguishing feature of the object on the second image of the object. In one embodiment, the image capturing device may include, or be associated with, a microscope.

A diamond identification apparatus relates to the field of examining natural and synthetic diamonds. The claimed apparatus for identifying a cut diamond comprises a measurement location with a measuring aperture at which the cut diamond to be examined is fixedly positioned; a movable optical system including a spectrometer, two sources of radiation at wavelengths of 250-280 nm and 350-380 nm, respectively, said two sources of radiation and the spectrometer being connected to the measurement location by optical fibres for inputting radiation into the cut diamond and by an optical fibre for outputting radiation from the cut diamond; and also a source of laser radiation at a wavelength of 532 nm and a microcontroller, wherein the cut diamond is positioned at the measurement location in such a way that the table of the diamond faces the measuring aperture of the measurement location, and the culet of the diamond is situated directly above the measuring aperture to which the optical fibres for inputting radiation and the optical fibre for outputting radiation are connected, and wherein the microcontroller is configured to control the alternate operation of the sources of radiation in a set time sequence, the movement of the optical system to allow the input of radiation into the cut diamond, and the processing of the spectrometer data.

A building structure includes a block of building material and a magnetic circuit buried in the block of building material. The structure also includes a plurality of sensing devices buried in the block of building material. Each sensing device may include a contactless power supplying circuit magnetically coupled with the magnetic circuit to generate a supply voltage when the magnetic circuit is subject to a variable magnetic field.

Method and systems are presented for authentication of precious stones, according to their natural ID and/or predetermined markings created in the stones, based on unique characteristic radiation response of the stone to predetermined primary radiation.

Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a gemstone to be assessed, one or more light source to provide uniform UV and non-UV illumination, an image capturing component, and a telecentric lens positioned to provide fluorescent images of the illuminated gemstone to the image capturing component. Also provided are methods of fluorescence analysis based on images collected using such an apparatus.

A multi-functional precious stone testing apparatus includes a microcontroller, a measuring unit for measuring properties of the testing object, and a functional unit. The measuring unit is arranged to measure one of a combination of ultraviolet and infrared distributions of the testing object and a combination of thermal and electrical conductivities of the testing object. The microcontroller analyzes a result from the measuring unit to generate a test result of the testing object, wherein the microcontroller includes a communication unit for connecting with an electronic device to transmit the test result thereto. The functional unit includes a voice indicator that generates a voice indication signal of the test result.