Ring Platinum - 5.89ct. tw. Aquamarine - Diamond - Unheated Emerald Cut
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Platinum ring with a 5.23 ct natural blue Brazilian aquamarine in an octagonal step cut, surrounded by 0.66 ct of natural round brilliant diamonds (E colour, VVS1), set in Pt 950, total weight 6.18 g, ring size EU 53, new condition, free resizing, and GFCO Gem Lab report AUP1676.
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Description from the seller
Brazilian Aquamarine & Diamond Platinum Ring – 5.23 ct – GFCO Certified
Presented by ParaibaCollective on Catawiki, this elegant ring features a 5.23-carat Natural Aquamarine from Brazil, displaying a beautiful blue color in a classic octagonal step cut.
The aquamarine is surrounded by 0.66 carats of natural round brilliant diamonds, graded E color and VVS clarity, and set in platinum with diamond-set shoulders.
Center Stone: Natural Aquamarine
Weight: 5.23 ct
Origin: Brazil
Color: Blue
Shape: Octagon
Cut: Step / Step
Diamonds: Natural, 0.66 ct total – E / VVS
Metal: Platinum
Total Ring Weight: 6.18 g
Hallmark: PT 950
Engraving: AQ 5.23 · D 0.66
Hallmark Position: Inside ring band
Laboratory: GFCO Gem Lab
Report ID: AUP1676
Report Date: 2 October 2026
Accompanied by its GFCO Gem Lab jewelry report confirming the Brazilian aquamarine and natural diamonds.
Seller's Story
From Mine to Market — Fine Quality Certified Gemstones
I am a gemstone professional dedicated to sourcing exceptional stones directly from mining regions and delivering them to collectors, investors, and jewelry houses worldwide. My focus is simple: authenticity, transparency, and uncompromising quality.
Working closely with trusted miners and local partners, I personally select gemstones at the source. By operating from mine to market, I reduce unnecessary middle layers while maintaining strict quality standards. Each stone is carefully evaluated for color, clarity, cut potential, and overall rarity before being offered for sale.
Many of my gemstones are certified by internationally recognized laboratories such as GRS, GIA, and other respected institutions to ensure confidence and peace of mind for buyers.
My specialization includes rare and high-quality stones, including fine cuprian tourmalines (Paraíba-type), emeralds, sapphires, and other collectible gems. Every piece is selected with the standards of serious collectors in mind.
I believe gemstones should not only be beautiful but also responsibly sourced and honestly represented. Clear descriptions, accurate photography, and professional communication are core principles of my business.
Whether you are a collector, investor, or jewelry designer, I aim to provide stones that combine beauty, rarity, and long-term value.
Thank you for visiting my profile. I look forward to supplying you with exceptional gemstones
Brazilian Aquamarine & Diamond Platinum Ring – 5.23 ct – GFCO Certified
Presented by ParaibaCollective on Catawiki, this elegant ring features a 5.23-carat Natural Aquamarine from Brazil, displaying a beautiful blue color in a classic octagonal step cut.
The aquamarine is surrounded by 0.66 carats of natural round brilliant diamonds, graded E color and VVS clarity, and set in platinum with diamond-set shoulders.
Center Stone: Natural Aquamarine
Weight: 5.23 ct
Origin: Brazil
Color: Blue
Shape: Octagon
Cut: Step / Step
Diamonds: Natural, 0.66 ct total – E / VVS
Metal: Platinum
Total Ring Weight: 6.18 g
Hallmark: PT 950
Engraving: AQ 5.23 · D 0.66
Hallmark Position: Inside ring band
Laboratory: GFCO Gem Lab
Report ID: AUP1676
Report Date: 2 October 2026
Accompanied by its GFCO Gem Lab jewelry report confirming the Brazilian aquamarine and natural diamonds.
Seller's Story
From Mine to Market — Fine Quality Certified Gemstones
I am a gemstone professional dedicated to sourcing exceptional stones directly from mining regions and delivering them to collectors, investors, and jewelry houses worldwide. My focus is simple: authenticity, transparency, and uncompromising quality.
Working closely with trusted miners and local partners, I personally select gemstones at the source. By operating from mine to market, I reduce unnecessary middle layers while maintaining strict quality standards. Each stone is carefully evaluated for color, clarity, cut potential, and overall rarity before being offered for sale.
Many of my gemstones are certified by internationally recognized laboratories such as GRS, GIA, and other respected institutions to ensure confidence and peace of mind for buyers.
My specialization includes rare and high-quality stones, including fine cuprian tourmalines (Paraíba-type), emeralds, sapphires, and other collectible gems. Every piece is selected with the standards of serious collectors in mind.
I believe gemstones should not only be beautiful but also responsibly sourced and honestly represented. Clear descriptions, accurate photography, and professional communication are core principles of my business.
Whether you are a collector, investor, or jewelry designer, I aim to provide stones that combine beauty, rarity, and long-term value.
Thank you for visiting my profile. I look forward to supplying you with exceptional gemstones
Details
Shape of surrounding stones
Round
Free resizing offered
Yes
Total carat weight of all stones
5.89
No. of main gemstones
1
Lab report number
AUP1676
Diamond colour grade of surrounding stones
E
Diamond type of surrounding stones
Natural
Laboratory report
GFCO Gem Lab
Era
After 2000
Cutting style of surrounding stones
Brilliant cut
Metal
Platinum
Brand jewellery
No
Total carat weight of main stone(s)
5.23
Main stone
Aquamarine
Colour of main stone
Blue
Total carat weight of surrounding stones
0.66
Surrounding stones
Diamond
Total weight
6.18 g
Diamond clarity grade of surrounding stones
VVS1
Cut grade of main stone
Excellent
Condition
New
Transparency of main stone
Transparent
Country of origin
Brazil
Clarity grade of main stone
Eye clean
Gender
Women
Title additional information
Unheated Emerald Cut
Treatment of main stone
No evidence of treatment
Shape of main stone
Octagon
Country of origin of main stone (if certified)
Brazil
Ring size
53 (EU) / 13 (IT) / 6 ¼ (US)
Sold by
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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.
