Optically transparent mark for marking gemstones

Abstract

The invention relates to marks used for marking gemstones, inter alia rough or cut diamonds, containing various types of information such as, for example, an identification code, and more particularly relates to marks which are invisible to the naked eye and under magnifying glasses and various types of microscopes, and which are placed inside the body of a rough or cut diamond without producing an effect that is detrimental to the quality of said rough or cut diamond. The invention addresses the technical problem of extending the use of such a mark to rough diamonds containing different amounts and types of natural impurities, inter alia nitrogen, and achieves the technical result of solving said problem while at the same time simplifying the marking process and reducing the potential effect of said process on the properties of the stone. This technical result is achieved by the use of an optically transparent mark placed inside the body of a rough or cut diamond, said mark containing predetermined encoded information and consisting of a given combination of micron- or submicron-sized optically transparent elements that are regions containing an elevated concentration of atomic defects in the crystal lattice of a rough or cut diamond, said atomic defects in the crystal lattice of a rough or cut diamond being vacancies and interstitials, wherein information is encoded in at least two regions of elevated concentration of said atomic defects.

Description

technical field [0001] The present invention relates to markings for the marking of precious stones, including diamonds and glitter, and carrying information for various purposes, e.g., known only to a small group of people, such as identification codes, and particularly relates to the use of magnifying glasses and microscopes of various types, Impairment of diamond quality through facets (sparkle) and markings in uncut natural and synthetic diamonds (hereinafter simply referred to as diamonds) that cannot be seen by the naked eye without affecting their characteristics. Background technique [0002] The problem of generating an image in a volume of a diamond crystal to, for example, mark a diamond for identification and tracking without compromising its quality and ultimately cost is well known, since some properties of diamonds make it difficult to generate such an image. very difficult. [0003] It is well known that diamond is transparent at wavelengths in the visible s...

AI Technical Summary

Problems solved by technology

[0021] However, it is not possible to generate markers by this method in diamonds without (or very little) natural nitrogen incorporation, since the formation of NV center clusters cannot be ensured, and at high concentrations of impurities in diamonds, so-called fluorescent Concentration quenching or no apparent drift of vacancies due to their being trapped by closely spaced defects

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