1 pcs Red Ruby - 3.05 ct - Gem research Swiss Lab (GRS) - Vivid to Deep Red Ruby
05
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15
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57
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21
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Current bid
€ 2,200
Reserve price not met
Expert
Selected by Purificacion Aquino Garcia
Holds a gemmology degree from IGE Madrid and an MBA from University of Santiago de Compostela.
Retail Estimate € 50,000 - € 65,000
22 other people are watching this object
 Bidder 7008 | €2,200 | |
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Natural ruby, 1 stone, 3.05 carats, vivid to deep red color from Mozambique, no heat treatment, GRS report GRS2025-070679, oval brilliant/step cut.
AI-assisted summary
Description from the seller
A beautiful 3.05 carat Natural Ruby, certified by GRS (GemResearch Swisslab), showing an exceptional vivid to deep red color—one of the most desirable color grades in fine Mozambique rubies.
This ruby is untreated, with the GRS report confirming “No indication of thermal treatment”, making it significantly rarer and more valuable.
The stone displays excellent brilliance thanks to its oval brilliant/step cut, giving it a strong, vibrant appearance when viewed under light.
The ruby has been tested and identified as originating from Mozambique, a source known for producing highly saturated, top-quality rubies.
Gemstone: Natural Ruby
Color: Vivid to Deep Red (GRS grade)
Shape: Oval
Cut: Brilliant/Step
Weight: 3.05 ct
Measurements: 10.70 × 7.18 × 4.00 mm
Treatment: No indication of thermal treatment (No Heat)
Origin: Mozambique
Laboratory: GRS – GemResearch Swisslab
Report Number: GRS2025-070679
Date: 22 July 2025
Perfect for collectors, investors, or for setting into a high-end jewellery piece.
A beautiful 3.05 carat Natural Ruby, certified by GRS (GemResearch Swisslab), showing an exceptional vivid to deep red color—one of the most desirable color grades in fine Mozambique rubies.
This ruby is untreated, with the GRS report confirming “No indication of thermal treatment”, making it significantly rarer and more valuable.
The stone displays excellent brilliance thanks to its oval brilliant/step cut, giving it a strong, vibrant appearance when viewed under light.
The ruby has been tested and identified as originating from Mozambique, a source known for producing highly saturated, top-quality rubies.
Gemstone: Natural Ruby
Color: Vivid to Deep Red (GRS grade)
Shape: Oval
Cut: Brilliant/Step
Weight: 3.05 ct
Measurements: 10.70 × 7.18 × 4.00 mm
Treatment: No indication of thermal treatment (No Heat)
Origin: Mozambique
Laboratory: GRS – GemResearch Swisslab
Report Number: GRS2025-070679
Date: 22 July 2025
Perfect for collectors, investors, or for setting into a high-end jewellery piece.
Details
Nr of stones
1
Lab report number
GRS2025-070679
Gemstone type
Ruby
Total carat weight
3.05
Gemstone colour
Red
Cut grade
Excellent
Transparency
Transparent
Clarity grade
Eye clean
Treatment
No heat treatment
Origin as given on certificate
Mozambique
Laboratory Report
Gem research Swiss Lab (GRS)
Sealed by laboratory
No
Title additional information
Vivid to Deep Red Ruby
Shape
Oval
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.
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.
