Abstract

A process for determining the type of a diamond having spin properties and physical properties, said process including the steps of: (i) determining the spin properties of a diamond of unknown type, using optically detected magnetic resonance to measure the spin properties of said diamond of an unknown type, wherein the spin properties are indicative of the physical properties of the diamond; (ii) comparing the spin properties of said unknown diamond with the spin properties of a plurality of diamonds of known types; and (iii) determining the type of said diamond of unknown type upon a predetermined threshold of correlation between the spin properties of said diamond of unknown type with the spin properties of a diamond of known type of said plurality of diamonds known types.

IPC Classes  ?

• G01N 24/10 - Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using electron paramagnetic resonance
• G01N 33/38 - ConcreteLimeMortarGypsumBricksCeramicsGlass
• G01R 33/32 - Excitation or detection systems, e.g. using radiofrequency signals

Abstract

A method of forming an identifiable marking at an outer surface of a plurality of articles formed from a solid-state material, wherein each marking is formed from one or more recesses extending from the outer surface and into the article, said method including the steps of (i) providing at least a first mask having a first surface and a second surface and having a plurality of mask patterns, wherein each mask pattern is formed by one or more apertures extending through the mask from the first surface and to the second surface, and wherein the pattern is indicative of the shape of marking to be formed; (ii) affixing a plurality of articles formed from a solid-state material relative to the mask such that an outer surface of each article of the plurality of articles is affixed adjacent a mask pattern and adjacent the first surface of the mask; and (iii) applying a plasma etching process in a direction of from towards the second surface of the mask and towards the plurality of articles, wherein the outer surface of each article exposed to the plasma etching through the apertures in the mask has a marking formed thereon by one or more recesses etched by the plasma etching process.

IPC Classes  ?

• H05H 1/46 - Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy

Abstract

A process for determining the type of a diamond having spin properties and physical properties, said process including the steps of: (i) determining the spin properties of a diamond of unknown type, using optically detected magnetic resonance to measure the spin properties of said diamond of an unknown type, wherein the spin properties are indicative of the physical properties of the diamond; (ii) comparing the spin properties of said unknown diamond with the spin properties of a plurality of diamonds of known types; and (iii) determining the type of said diamond of unknown type upon a predetermined threshold of correlation between the spin properties of said diamond of unknown type with the spin properties of a diamond of known type of said plurality of diamonds known types.

IPC Classes  ?

• G01N 24/10 - Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using electron paramagnetic resonance
• G01N 33/38 - ConcreteLimeMortarGypsumBricksCeramicsGlass
• G01R 33/32 - Excitation or detection systems, e.g. using radiofrequency signals

Abstract

a); and a control module (120) in communication with the optical image acquisition device (110), for controlling the acquisition of optical images of gemstones thereof; wherein said optical image of the gemstone is processed by a processor to ascertain one or more optical characteristics of the gemstone.

IPC Classes  ?

• G01N 21/958 - Inspecting transparent materials
• G01N 21/88 - Investigating the presence of flaws, defects or contamination

Abstract

A process of assigning a colour grade to a diamond, including the steps of (i) determining the N3 and C-center content of a diamond (110); (ii) comparing the N3 and C-center content of the diamond with a previously acquired data set from a plurality of diamonds each having a colour grading previously assigned thereto, and (iii) assigning a colour grade to the diamond upon a correlation of the N3 and C-center content of said diamond with a grade of said previously acquired data set; wherein said previously acquired data set comprises a correlation between N3 and C center content and optical absorbance in the visible light spectrum for each diamond of said plurality of diamonds.

IPC Classes  ?

• G01N 21/87 - Investigating jewels
• G01N 33/38 - ConcreteLimeMortarGypsumBricksCeramicsGlass

Abstract

A process operable using a computerized system (300) grades the clarity of a diamond (315, 400) as a function of internal defects within its body (315, 400). The computerized system (300) includes an optical image acquisition device (310), a processor module (320) and an output module (340) operably interconnected together. The process includes the steps of (i) acquiring via an optical image acquisition device (310) a plurality of top view images of a diamond (315, 400); (ii) in a processor module (320), detecting defects within the body of the diamond (315, 400); and (iii) from an output module (340), providing a signal indicative of the clarity grade assigned in (ii).

IPC Classes  ?

• G01N 21/87 - Investigating jewels
• G06Q 30/02 - MarketingPrice estimation or determinationFundraising
• G06T 7/00 - Image analysis
• G06Q 30/0242 - Determining effectiveness of advertisements

Abstract

A process is operable using a computerized system for grading the colour of a diamond using a pre-trained neural network for determination of a colour grading. The computerized system includes an optical image acquisition device, a pre-trained neural network and an output module operably interconnected together via a communication link. The process includes: (i) acquiring via an optical image acquisition device one or more optical image of at least a portion of a diamond; and (ii) in a pre-trained neural network, providing a regressive value associated with the colour grade of the diamond.

IPC Classes  ?

• G01J 3/50 - Measurement of colourColour measuring devices, e.g. colorimeters using electric radiation detectors
• G06T 7/90 - Determination of colour characteristics
• G01N 21/87 - Investigating jewels
• G06T 7/00 - Image analysis

Abstract

A process is operable using a computerized system for grading the clarity of a diamond. The computerized system includes an optical image acquisition device, a processor, a pre-trained neural network and an output module operably interconnected together. The process includes: (i) acquiring via an optical image acquisition device one or more plural axial view images of a diamond with different focus depths; (ii) in a processor, combining the plural axial views to form one or more single optical images; (iii) in a pre-trained neural network, providing a regressive value associated with the clarity grade of the diamond based on the one or more single images acquired during step (i); and (iv) from an output module, providing a clarity grade to the diamond (i) by correlating the regression value from (ii) to a clarity grade.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• G01N 21/87 - Investigating jewels
• G06T 7/90 - Determination of colour characteristics
• G06T 7/00 - Image analysis

Abstract

A process operable using a computerized system (300) grades the clarity of a diamond (315, 400) as a function of internal defects within its body (315, 400). The computerized system (300) includes an optical image acquisition device (310), a processor module (320) and an output module (340) operably interconnected together. The process includes the steps of (i) acquiring via an optical image acquisition device (310) a plurality of top view images of a diamond (315, 400); (ii) in a processor module (320), detecting defects within the body of the diamond (315, 400); and (iii) from an output module (340), providing a signal indicative of the clarity grade assigned in (ii).

IPC Classes  ?

• G01N 21/87 - Investigating jewels
• G06T 7/00 - Image analysis
• G06Q 30/02 - MarketingPrice estimation or determinationFundraising

Abstract

A computerized system for grading the colour of a diamond, wherein the colour of the diamond is graded based on a predetermined threshold of correlation of colour of a diamond with the colour of a diamond of a plurality of diamonds each having a colour grading assigned thereto, the computerized system including: an optical image acquisition device for acquiring at least a first optical image of a diamond, wherein the first optical image is acquired at a predetermined angle of inclination to the central axis extending normal to the table and through the apex of the pavilion of the diamond and in a direction of towards the table and wherein the first optical image is acquired in an environment having a predetermined constant light level; a processor module for comparing data derived from acquisition of the at least a first optical image with a plurality of data sets each of which corresponds to a diamond of a plurality of diamonds, wherein data sets are each derived from an optical image acquired by an optical image acquisition device in an environment having a predetermined constant light the same as that as (i) and each of the data sets is assigned a colour grading, and wherein said data derived from acquisition of the at least a first optical image and the data of said data sets is data indicative of the colour of the diamond from which it is acquired; and an output module, for responsive to a predetermined threshold of correlation between the data derived from input of the first optical image and one of the plurality of data sets, providing an output signal indicative of the colour grade of the diamond.

IPC Classes  ?

• G06T 7/90 - Determination of colour characteristics
• G01N 21/87 - Investigating jewels

Abstract

A system (1) for viewing a gemstone, the system (1) including a first light source (2) configured for selectably illuminating at least one of a plurality of features of the gemstone; an optical magnifying unit (10) configured for providing a magnified view of the plurality of the features of the gemstone in which at least one of the plurality of features of the gemstone is selectably illuminated by the first light source (2); and a viewing display unit (11) configured for displaying a representation of the magnified view.

IPC Classes  ?

• G01N 21/00 - Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
• G01N 21/87 - Investigating jewels
• G02B 27/02 - Viewing or reading apparatus