Jacksonville Gemological Laboratory (JGL) has been serving Jacksonville for over 35 years. Using experience, equipment and technology we provide professional appraisals, evaluations, and identifications of diamonds, and colored stones. JGL is experienced in producing appraisals as per GIA grading guidelines and determining market or insurance replacement value. Our experts will advise you as to which type of appraisal you may need depending on the intended purpose of the appraisal.