No reserve price - 1 pcs Blue Sapphire - 4.99 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Rare natural sapphire
05
days
12
hours
34
minutes
10
seconds
Starting bid
€ 1
No reserve price
Expert
Selected by Purificacion Aquino Garcia
Holds a gemmology degree from IGE Madrid and an MBA from University of Santiago de Compostela.
Retail Estimate € 1,400 - € 1,700
No bids placed
Catawiki Buyer Protection
Your payment’s safe with us until you receive your object.View details
Trustpilot 4.4 | 122290 reviews
Rated Excellent on Trustpilot.
Description from the seller
Species:
Natural Corundum
Varieties
Zaffiro
Weight:
4.99 carats
Measures:
15.50 x 10.07 x 3.93 mm
Color:
Deep/Dark Blue – Greenish
Transparency
Transparent
Cut
A pear-shaped gemstone, with a mixed cut, elegant and refined, designed to enhance the saturation of color and the internal brilliance of the gem.
Purity
The stone exhibits excellent transparency with inclusions characteristic of untreated natural crystals, confirming its authentic origin.
Treatment
No indication of heating, which adds further value and rarity to the gem, as it is completely natural.
Origin:
The visual aspect and the quality of the stone are compatible with high-end deposits such as Kashmir, Myanmar, or Sri Lanka. (Further analysis may be necessary for a more precise determination.)
Report and emission laboratory number.
ALGT Report No. 52541800 – Antwerp Laboratory for Gemstone Testing, dated September 1, 2023
Shipping method
Insured shipment via specialized courier, with tracking and professional custody. Packaging in a protective box with a copy of the original ALGT certificate.
This gem represents a unique opportunity for collectors and investors: a nearly 5-carat natural sapphire, with an elegant cut and high transparency, untreated, with international certification. Ideal for high jewelry creations or as a long-term investment.
Species
Natural Corundum
Variety:
Sapphire
Weight:
4.99 carats
Measurements
15.50 x 10.07 x 3.93 mm
Color:
Deep blue with greenish overtones
Transparency
Transparent
Cut:
Pear-shaped, mixed cut – a refined and elegant style that enhances the gem’s depth of color and internal brilliance.
Clarity:
Excellent transparency with minor natural inclusions typical of untreated sapphires, confirming its authenticity and origin.
Treatment:
No indication of heating – this natural, untreated condition significantly increases its rarity and market value.
Origin:
Not stated in the report. However, the visual characteristics and overall quality suggest potential origin from premium sources such as Kashmir, Myanmar (Burma), or Sri Lanka. (Further origin determination available upon request.)
Report number and laboratory
ALGT Report No. 52541800 – Antwerp Laboratory for Gemstone Testing, issued on September 1, 2023
Shipping Method
Fully insured shipping via specialized courier service. Delivered in a protective box along with the original ALGT certificate.
Species:
Natural Corundum
Varieties
Zaffiro
Weight:
4.99 carats
Measures:
15.50 x 10.07 x 3.93 mm
Color:
Deep/Dark Blue – Greenish
Transparency
Transparent
Cut
A pear-shaped gemstone, with a mixed cut, elegant and refined, designed to enhance the saturation of color and the internal brilliance of the gem.
Purity
The stone exhibits excellent transparency with inclusions characteristic of untreated natural crystals, confirming its authentic origin.
Treatment
No indication of heating, which adds further value and rarity to the gem, as it is completely natural.
Origin:
The visual aspect and the quality of the stone are compatible with high-end deposits such as Kashmir, Myanmar, or Sri Lanka. (Further analysis may be necessary for a more precise determination.)
Report and emission laboratory number.
ALGT Report No. 52541800 – Antwerp Laboratory for Gemstone Testing, dated September 1, 2023
Shipping method
Insured shipment via specialized courier, with tracking and professional custody. Packaging in a protective box with a copy of the original ALGT certificate.
This gem represents a unique opportunity for collectors and investors: a nearly 5-carat natural sapphire, with an elegant cut and high transparency, untreated, with international certification. Ideal for high jewelry creations or as a long-term investment.
Species
Natural Corundum
Variety:
Sapphire
Weight:
4.99 carats
Measurements
15.50 x 10.07 x 3.93 mm
Color:
Deep blue with greenish overtones
Transparency
Transparent
Cut:
Pear-shaped, mixed cut – a refined and elegant style that enhances the gem’s depth of color and internal brilliance.
Clarity:
Excellent transparency with minor natural inclusions typical of untreated sapphires, confirming its authenticity and origin.
Treatment:
No indication of heating – this natural, untreated condition significantly increases its rarity and market value.
Origin:
Not stated in the report. However, the visual characteristics and overall quality suggest potential origin from premium sources such as Kashmir, Myanmar (Burma), or Sri Lanka. (Further origin determination available upon request.)
Report number and laboratory
ALGT Report No. 52541800 – Antwerp Laboratory for Gemstone Testing, issued on September 1, 2023
Shipping Method
Fully insured shipping via specialized courier service. Delivered in a protective box along with the original ALGT certificate.
Details
Nr of stones
1
Lab report number
52541800
Gemstone type
Sapphire
Total carat weight
4.99
Gemstone colour
Blue
Cut grade
Good
Transparency
Transparent
Clarity grade
Slight
Treatment
No evidence of treatment
Origin as given on certificate
No origin given
Laboratory Report
Antwerp Laboratory for Gemstone Testing (ALGT)
Sealed by laboratory
No
Title additional information
Rare natural sapphire
Shape
Pear
Cutting style
Mixed cut
Sold by
Disclaimer
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.
