FIELD: methods of big crystals growing. SUBSTANCE: method uses reverse temperature difference in process of alexandrite big crystals growing from melt, that has initial material of beryllium and aluminum oxides with chromophore additions or substandard alexandrite, and flux-solvent. To realize version of crystal growth compositions of high density are used as flux. Charge components are floating on molten bath surface and under action of temperature difference are transferred down on bottom of vessel. To control number of formed nucleus crystal growth is exercised on special platinum base, that has definite number of notches or holes. Under constant state of oversaturation formed by value of temperature gradient crystal nucleus supply with feeding material is exercised uniformly, providing qualitative growth of big crystals. EFFECT: improved process.
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