INFLUENCE OF HEAT TREATMENT ON BERYLS FROM BARARATA AND ANALAKELY-VOHAMBOHITRA ANKAZOBE QUARRIES, MADAGASCAR COLOR IMPROVEMENT AND GEMMOLOGICAL IMPLICATIONS - Tommy, RAZAFIMAROSON Yvan; Louisa, RAMIANDRISOA Njararivelo; Raymond, RAKOTONDRAZAFY (International Journal of Advance Research and Innovative Ideas In Education, 2024)