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1. CRYSTALLOCHEMICAL CHARACTERISTICS AND COLOR ORIGIN OF JEWELRY DEMANTOIDS AT THE SKALNY MANIFESTATION (POLAR URALS, RUSSIA).

2. APPLICATION OF NEURAL NETWORKS IN REGRESSION PROBLEMS WITH QUALITATIVE DATA ON AN EXAMPLE OF GEMSTONES VALUATION.

3. PRECIOUS AND DECORATIVE NON-METALLIC MINERALS FROM EAST KAZAKHSTAN: GEOLOGICAL DEPOSITS AND PRESENT UTILISATION.

4. DEVELOPMENT OF PRECIOS STONES MINES IN IRAN, CASE STUDY: EXPLOITATION OF MEASURMENT POSSIBILITY OF AGAT AND JASPER MINERALS- SOLTANIEH AREA.