1 pcs Blue Spinel - 4.11 ct - Lotus Gemology
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Selected by Purificacion Aquino Garcia
Holds a gemmology degree from IGE Madrid and an MBA from University of Santiago de Compostela.
Retail Estimate € 1,500 - € 1,900
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Natural blue spinel, 4.11 ct, one stone, Antique Cushion cut, eye-clean and transparent, with no indications of treatments and origin Tanzania (Mahenge), Lotus Gemology report no. 1108-8627.
AI-assisted summary
Description from the seller
Natural Blue Cobalt Spinel (DEEP BLUE) from 4.11 ct – Tanzania / Mahenge – untreated – Lotus Gemology Certificate
Magnificent natural blue spinel weighing 4.11 carats, accompanied by the prestigious Lotus Gemology Gold gemological report, one of the most valued international laboratories in the colored stones sector.
The gem features an elegant Antique Cushion cut, with a brilliant-cut crown and a modified stepped pavilion, a combination capable of enhancing the depth of color and creating fascinating blue reflections, with an intense and sophisticated appearance.
The laboratory describes the stone as transparent, blue in daylight, with medium saturation and deep tone. The most important element is the absence of any indication of heating or treatment: this is therefore a natural spinel whose color is not artificially modified, a characteristic particularly appreciated by collectors and connoisseurs.
The generous dimensions of 10.75 × 8.63 × 5.33 mm and a weight over four carats confer a strong presence to the stone, ideal both for a gemmological collection and for the creation of a unique piece of jewelry, such as a cocktail ring, a pendant, or a high jewelry creation.
The Lotus report also certifies the origin from Tanzania, a country renowned for producing spinels of great charm and quality. Highly likely to originate from the famous Mahenge mines.
A gem with a decisive, elegant, and contemporary character, capable of combining substantial size, deep color, certified origin, and complete absence of treatments.
Natural Blue Cobalt Spinel (DEEP BLUE) from 4.11 ct – Tanzania / Mahenge – untreated – Lotus Gemology Certificate
Magnificent natural blue spinel weighing 4.11 carats, accompanied by the prestigious Lotus Gemology Gold gemological report, one of the most valued international laboratories in the colored stones sector.
The gem features an elegant Antique Cushion cut, with a brilliant-cut crown and a modified stepped pavilion, a combination capable of enhancing the depth of color and creating fascinating blue reflections, with an intense and sophisticated appearance.
The laboratory describes the stone as transparent, blue in daylight, with medium saturation and deep tone. The most important element is the absence of any indication of heating or treatment: this is therefore a natural spinel whose color is not artificially modified, a characteristic particularly appreciated by collectors and connoisseurs.
The generous dimensions of 10.75 × 8.63 × 5.33 mm and a weight over four carats confer a strong presence to the stone, ideal both for a gemmological collection and for the creation of a unique piece of jewelry, such as a cocktail ring, a pendant, or a high jewelry creation.
The Lotus report also certifies the origin from Tanzania, a country renowned for producing spinels of great charm and quality. Highly likely to originate from the famous Mahenge mines.
A gem with a decisive, elegant, and contemporary character, capable of combining substantial size, deep color, certified origin, and complete absence of treatments.
Details
Number of stones
1
Lab report number
1108-8627
Gemstone type
Spinel
Total carat weight
4.11
Gemstone colour
Blue
Transparency
Transparent
Clarity grade
Eye clean
Treatment
No evidence of treatment
Origin as given on certificate
Tanzania
Laboratory report
Lotus Gemology
Sealed by laboratory
No
Shape
Cushion
Cutting style
Faceted 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.
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.
