Identifying natural fancy color diamonds at Naturalmark Lab requires advanced gemological techniques to distinguish them from natural treated or synthetic colored diamonds.
Cleaning: Clean the diamond thoroughly using an ultrasonic cleaner or steam to remove oils and dirt.
Visual Inspection: Inspect the diamond under a 10x loupe or microscope. Record the diamond’s color, shape, and any visible inclusions or surface features.
Growth Patterns: Examine for natural growth lines and zoning patterns, which are different from Labgrown diamonds.
Phosphorescence Testing: Some natural fancy color diamonds (like blue diamonds) may exhibit phosphorescence, glowing after the UV light source is turned off.
UV-Visible Spectroscopy: Detects the absorption characteristics responsible for the color. Natural fancy color diamonds exhibit distinct absorption bands compared to treated or synthetic ones.
Infrared (FTIR) Spectroscopy: Determines the presence of nitrogen or boron impurities. Identifies natural Type Ia, Ib, IIa, or IIb diamonds and distinguishes natural from treated or Labgrown diamonds.
Raman Spectroscopy: Confirms diamond authenticity by detecting the diamond peak at 1332 cm⁻¹. Identifies any coating or surface treatments.
Assess whether the color is natural or treated (e.g., HPHT or irradiation). Use a combination of spectroscopy and luminescence data to make a conclusive judgment.
Lets walk you through the report issued by Naturalmark.
Report : It carries a unique report number, an alpha numeric value for that loose diamond or piece of jewellery screened at Naturalmark Lab and is also used by the customer to check its authenticity by putting in the verify report section of our website.
Description : This tells whether the stones are of Natural or synthetic origin and whether the stones are treated or not and the type of treatment (HPHT)
Laser Engraving : A lot of stones are brought to Naturalmark Lab for Reverification and if they already have a number inscribed on its girdle, we put that number in the report issued to ensure that the piece screened has it inscribed and came for reverification.
Remarks : Any additional information required will be mentioned in the remarks section
Date : Gives the date in DDMMYY format on which Screening was done.
