No Reserve Price - 1 pcs Diamond (Colour-treated) - 1.48 ct - Round - Fancy Black - Not specified in lab report - Antwerp Laboratory for Gemstone Testing (ALGT)
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Natural treated black diamond, round brilliant cut, 1.48 carat, measurements 6.55 × 6.63 × 5.25 mm, girdle very thick, polish Good, symmetry Good, color Fancy Black, color origin Treated, lab ALGT report 66661009.
AI-assisted summary
Description from the seller
15 September, 2025
Algt Diamond Grading Report # 66661009
Identification ................................................................. Natural Diamond
Shape And Cutting Style ................................... Round, Brilliant Variation
Measurements ................................................. 6.55 X 6.63 X 5.25 mm
Grading Results
Carat Weight ............................................................................ 1.48 Carat
Color Grade .......................................................................Fancy Black
Color Origin ..................................................................................... Treated
Clarity Grade ............................................................................................ Not Applicable
Additional Grading Characteristics
Polish ....................................................................................................... Good
Symmetry .................................................................................. Good
Girdle ................................................................Very Thick
Fluorescence ............................................................................................. None
Comments
Plotting not applicable
Treated Black diamond may show surface abrasions
This diamond has been treated by one or several processes to change its color
15 September, 2025
Algt Diamond Grading Report # 66661009
Identification ................................................................. Natural Diamond
Shape And Cutting Style ................................... Round, Brilliant Variation
Measurements ................................................. 6.55 X 6.63 X 5.25 mm
Grading Results
Carat Weight ............................................................................ 1.48 Carat
Color Grade .......................................................................Fancy Black
Color Origin ..................................................................................... Treated
Clarity Grade ............................................................................................ Not Applicable
Additional Grading Characteristics
Polish ....................................................................................................... Good
Symmetry .................................................................................. Good
Girdle ................................................................Very Thick
Fluorescence ............................................................................................. None
Comments
Plotting not applicable
Treated Black diamond may show surface abrasions
This diamond has been treated by one or several processes to change its color
Details
Lab report number
66661009
Diamond type
Colour-treated
Natural fancy colour
Black
Number of diamonds
1
Fancy colour intensity
Fancy
Total carat weight
1.48
Diamond Clarity Grade
Not specified in lab report
Symmetry
Good
Polish
Good
Girdle
Very thick
Laboratory Report
Antwerp Laboratory for Gemstone Testing (ALGT)
Sealed by laboratory
No
Laser Engraved
No
Weight
0.50-0.69
Shape
Round
Cutting style
Brilliant cut
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Catawiki always aims to offer you the best possible buying experience. Our experts virtually review and select every object in line with our submission guidelines. While we strive to provide a detailed description and photographs of each jewellery object, discrepancies or inaccuracies may occur. It is your responsibility to review all of the information provided about an object, including the condition and description, before placing an order. Sellers are responsible for the information, pictures and description provided, including the quality, quantity and nature of the jewelry supplied. A small imperfection that cannot be seen in the photo but is included in the description is not a non-conformity. A Lab Report is not a guarantee, valuation or appraisal regarding the articles described therein. A Lab Report contains only the characteristics of an article described after it has been graded, tested, examined, and analyzed using the techniques and equipment used at the time of the examination from that specific Lab. The results of any other examination performed on the article may differ depending when, how, by whom and with which grading standard the article is examined. In addition, any changes and improvements in techniques and equipment that may have occurred which may enable the examiner to detect, among other things, the use of processes for altering the characteristics of an article which use was previously undetectable, does not automatically mean the object does not conform to its description.
