An Opinion of Value is a Researched Conclusion Supported by Facts Interpreted from the Marketplace Procedure The jewelry is first cleaned, then noting the condition, identification, measurement's of the gemstone, color, clarity and cut are graded. A diagram/plot of each diamond weighing 0.50 carats and above. Metal fineness, weight of mounting and annalyze the method and style of manufacturing, determine circa date or period if possible and a photo. Allow a minimum appointment time of 1/2 hour. Reports are posted (mailed/delivered) in 7-14 business days, depending on report type. Equipment Available Microscope Color Graded (by GIA) Natural Diamonds: F, G, L, M Leveridge Gauge Polariscope Refractometer Touchstone and Acid for Testing of Metal Fineness Gem Dialogue UV Light Nikon Cool Pix Camera In conformity with the “Uniform Standards of Professional Appraisal Practice” authorized by Congress as the Source of Appraisal Standards and Appraiser Qualifications If I suspect "enhancement" I will recommend that the item be submitted to a recognized lab that is able to identify the treatment. This is also advice for origin of color: diamonds, color stones and pearls.