METHOD FOR MONITORING INTEGRITY OF GEMSTONE CRYSTALS IN PROCESSES OF TECHNOLOGICAL PROCESSING Russian patent published in 2018 - IPC G01N23/83 

FIELD: control.

SUBSTANCE: using to control the integrity of gemstone crystals during technological processing. Essence of the invention is that a control collection of simulation crystals is formed and they are studied by scanning with a computer tomography system with the formation of a database of images of simulation crystals. Then, subsequent identification of simulation crystals, reconstruction and comparison of 3D images of each simulation crystal before and after the extraction from the process is performed. As a criterion for the integrity of crystals, the criterion of mass loss of all the crystals under study is used:

where k – number of simulation crystals in the collection. Integrity is evaluated by the degree of crystal damage, defined as the ratio of the mass losses of the simulation crystals (ML) to the production induced damage (PID), expressed in percent, calculated by the formula:

Collection of simulation crystals is formed by the synthesis of crystals with predetermined strength properties and / or obtaining a predetermined color. On the simulation crystals, markers are applied for their subsequent identification. Evaluation is performed by a computer tomography system consisting of an X-ray tomograph, additionally equipped with a crystal positioning device, and a personal computer.

EFFECT: increase in the accuracy and objectivity of the monitoring of integrity of crystals.

6 cl, 2 tbl, 1 dwg